9276 Federal Register / Vol. 72, No. 40 / Thursday, March 1, 2007 / Proposed Rules 

calculated, if reliable or conservative 

aerodynamic data is used. Power, as 

specified in § 25.175(b)(1)(iv), is 

assumed until recovery is made, at 

which time power reduction and the use 

of pilot controlled drag devices may be 

used. 

(b) From a speed below VC/MC with 

power to maintain stabilized level flight 

at this speed, the airplane is upset so as 

to accelerate through VC/MC at a flight 

path 15 degrees below the initial path—

or at the steepest nose down attitude 

that the system will permit with full 

control authority if less than 15 degrees. 

Note: The pilot’s controls may be in the 

neutral position after reaching VC/MC and 

before recovery is initiated. 

(c) Recovery may be initiated three 

seconds after operation of high speed 

warning system by application of a load 

of 1.5g (0.5 acceleration increment) or 

such greater load factor that is 

automatically applied by the system 

with the pilot’s pitch control neutral. 

Power may be reduced simultaneously. 

All other means of decelerating the 

airplane, the use of which is authorized 

up to the highest speed reached in the 

maneuver, may be used. The interval 

between successive pilot actions must 

not be less than one second. 

(d) The applicant must also 

demonstrate that the design dive speed, 

established above, will not be exceeded 

during pilot-induced or gust-induced 

upsets in non-symmetric attitudes. 

(e) The occurrence of any failure 

condition that would reduce the 

capability of the overspeed protection 

system must be improbable (less than 

10–5 per flight hour). 

Issued in Renton, Washington, on February 

23, 2007. 

Ali Bahrami, 

Manager, Transport Airplane Directorate, 

Aircraft Certification Service. 

[FR Doc. E7–3582 Filed 2–28–07; 8:45 am] 

BILLING CODE 4910–13–P 

DEPARTMENT OF TRANSPORTATION 

Federal Aviation Administration 

14 CFR Part 39 

[Docket No. FAA–2005–23072; Directorate 

Identifier 2005–NE–38–AD] 

RIN 2120–AA64 

Airworthiness Directives; Pratt & 

Whitney JT9D–7R4 Turbofan Engines 

AGENCY: Federal Aviation 

Administration (FAA), Department of 

Transportation (DOT). 

ACTION: Notice of proposed rulemaking 

(NPRM). 

SUMMARY: The FAA proposes to 

supersede an existing airworthiness 

directive (AD) for Pratt & Whitney (PW) 

JT9D–7R4 turbofan engines. That AD 

currently requires inspection of the 

blade root thickness of 1st stage fan 

blades identified by part number (P/N) 

and serial number (SN) in the AD. This 

proposed AD would require the same 

actions but would correct 12 P/Ns, add 

10 part SNs, and add the definition of 

next fan blade exposure to the 

compliance section. This proposed AD 

results from the discovery of inaccurate 

part quantity, part numbers, and serial 

numbers used in AD 2005–26–09. We 

are proposing this AD to prevent 1st 

stage fan blade fracture and uncontained 

engine failure, resulting in possible 

damage to the airplane. 

DATES: We must receive any comments 

on this proposed AD by April 30, 2007. 

ADDRESSES: Use one of the following 

addresses to comment on this proposed 

AD. 

• DOT Docket Web site: Go to 

http://dms.dot.gov and follow the 

instructions for sending your comments 

electronically. 

• Government-wide rulemaking Web 

site: Go to http://www.regulations.gov 

and follow the instructions for sending 

your comments electronically. 

• Mail: Docket Management Facility; 

U.S. Department of Transportation, 400 

Seventh Street, SW., Nassif Building, 

Room PL–401, Washington, DC 20590–

0001. 

• Fax: (202) 493–2251. 

• Hand Delivery: Room PL–401 on 

the plaza level of the Nassif Building, 

400 Seventh Street, SW., Washington, 

DC, between 9 a.m. and 5 p.m., Monday 

through Friday, except Federal holidays. 

FOR FURTHER INFORMATION CONTACT: 

Kevin Donovan, Aerospace Engineer, 

Engine Certification Office, FAA, Engine 

and Propeller Directorate, 12 New 

England Executive Park, Burlington, MA 

01803–5299; telephone (781) 238–7743, 

fax (781) 238–7199. 

SUPPLEMENTARY INFORMATION: 

Comments Invited 

We invite you to send any written 

relevant data, views, or arguments 

regarding this proposal. Send your 

comments to an address listed under 

ADDRESSES. Include ‘‘Docket No. FAA–

2005–23072; Directorate Identifier 

2005–NE–38–AD’’ in the subject line of 

your comments. We specifically invite 

comments on the overall regulatory, 

economic, environmental, and energy 

aspects of the proposed AD. We will 

consider all comments received by the 

closing date and may amend the 

proposed AD in light of those 

comments. 

We will post all comments we 

receive, without change, to http:// 

dms.dot.gov, including any personal 

information you provide. We will also 

post a report summarizing each 

substantive verbal contact with FAA 

personnel concerning this proposed AD. 

Using the search function of the DMS 

Web site, anyone can find and read the 

comments in any of our dockets, 

including the name of the individual 

who sent the comment (or signed the 

comment on behalf of an association, 

business, labor union, etc.). You may 

review the DOT’s complete Privacy Act 

Statement in the Federal Register 

published on April 11, 2000 (65 FR 

19477–78) or you may visit http:// 

dms.dot.gov. 

Examining the AD Docket 

You may examine the docket that 

contains the proposal, any comments 

received and any final disposition in 

person at the Docket Management 

Facility between 9 a.m. and 5 p.m., 

Monday through Friday, except Federal 

holidays. The Docket Office (telephone 

(800) 647–5227) is located on the plaza 

level of the Department of 

Transportation Nassif Building at the 

street address stated in ADDRESSES. 

Comments will be available in the AD 

docket shortly after the DMS receives 

them. 

Discussion 

On December 16, 2005, the FAA 

issued AD 2005–26–09, Amendment 

39–14430 (70 FR 76381, December 27, 

2005). That AD requires inspection of 

the blade root thickness of 1st stage fan 

blades identified by P/N and SN. That 

AD was the result of a report of a repair 

station that created an unapproved 

repair on 1st stage fan blades. That 

condition, if not corrected, could result 

in 1st stage fan blade fracture and 

uncontained engine failure, resulting in 

possible damage to the airplane. 

Actions Since AD 2005–26–09 Was 

Issued 

Since AD 2005–26–09 was issued, we 

received comments on the AD 

requesting clarification. We considered 

those requests and have changed the 

compliance section in this proposed AD 

for clarification. We also found and 

corrected 12 incorrect P/Ns, and added 

10 part SNs of affected 1st stage fan 

blades to Table 1 of this proposed AD. 

The comments and affected P/Ns and 

SNs are also discussed below. 


rmajette on PROD1PC67 with PROPOSALS
Federal Register / Vol. 72, No. 40 / Thursday, March 1, 2007 / Proposed Rules 9277 

Request To Clarify ‘‘At the Next 1st 

Stage Fan Blade Exposure’’

Two air carriers request that we 

clarify ‘‘at the next 1st stage fan blade 

exposure,’’ to prevent any in-service 

disruptions or delays. The commenter 

further states that the 1st stage fan 

blades can be exposed when: 

• Some 1st stage fan blades are 

replaced due to in-service foreign object 

damage; 

• A 1st stage fan hub is replaced and 

the same 1st stage fan blades are reused; 

and 

• At shop visit when 1st stage fan 

blades are removed from the fan hub for 

cause or work scope. 

We agree with adding a paragraph to 

the proposed AD which defines next 1st 

stage fan blade exposure. We have 

defined it as when any 1st stage fan 

blade is removed from the engine; or 

when the 1st stage fan hub is removed 

from the engine. 

Suggestion To Report When Finding 

Affected 1st Stage Fan Blades 

Air Canada suggests that operators 

finding any affected 1st stage fan blades 

should report back to the FAA. The 

commenter states that by requiring this 

reporting, all 520 of the blades can then 

be accounted for, and the FAA can close 

the AD. The commenter is also 

concerned that if some blades cannot be 

accounted for, such as blades already 

scrapped, misplaced, or shelved, then 

the AD will never be closed, and 

operators will be forced to verify the AD 

indefinitely at every 1st stage fan blade 

installation. 

We do not agree. This proposed AD 

requires a onetime inspection for a 

specific population of 1st stage fan 

blades. If an operator has inspected and 

verified a certain set of 1st stage fan 

blades in accordance with the proposed 

AD, then at the next 1st stage fan blade 

exposure, only replacement blades that 

are listed in Table 1 of the proposed AD 

will require inspection and verification. 

Request To Clarify or Remove 

Paragraph (e) 

Air Canada states that compliance 

paragraph (e) mentions that the AD 

must be performed within the 

compliance times specified, but there 

are no times specified. The commenter 

requests this instruction be removed or 

clarified. 

We partially agree. We revised the 

compliance times for clarification in the 

proposed AD. 

Comment That ‘‘At Exposure’’ Limit Is 

Not a Practical Limit 

ABX AIR claims that the ‘‘at 

exposure’’ limit in the AD is not 

practical. They said that ‘‘at exposure’’

will require the operators to set up a 

special inspection schedule to 

accomplish this onetime inspection 

which is not suitable for fleet operators. 

We partially agree. Inspecting the 

affected parts at the next 1st stage fan 

blade exposure is sufficient. It is not 

necessary for operators to set up a 

special inspection schedule since this 

inspection does not impact the FAAapproved maintenance program 

procedures. However, for clarification, 

we added a definition for ‘‘next first 

stage fan blade exposure’’ to the 

proposed AD. 

Request To Clarify ‘‘Before Installing 

the 1st Stage Fan Blades’’

ABX AIR requests that we clarify 

‘‘before installing the 1st stage fan 

blades’’ in paragraph (f). ABX believes 

the AD should contain a concise 

clarifying statement such as: ‘‘After the 

active date of this AD, no person may 

install, on any airplane, any blade listed 

in Table 1 of this AD unless the actions 

of this AD have already been 

accomplished.’’

We agree. We added a prohibition 

statement that states that after the 

effective date of this (proposed) AD, do 

not install any 1st stage fan blades listed 

in Table 1 of this AD on any airplane, 

unless the actions of this AD have been 

done to the 1st stage fan blades. 

P/Ns Corrected, and P/Ns and SNs 

Added 

Since we issued AD 2005–26–09, we 

found and corrected 12 incorrect P/Ns, 

and added 10 part SNs of affected 1st 

stage fan blades in Table 1 of this 

proposed AD. The corrected numbers 

are as follows: 

Incorrect P/Ns Corrected 

P/Ns SNs 

5001341–023 .... 5001341–022 JW2313 

5001341–024 .... 5001341–022 JW2498 

5001341–025 .... 5001341–022 JW2541 

5001341–026 .... 5001341–022 JW2560 

5001341–027 .... 5001341–022 JW2589 

5001341–028 .... 5001341–022 JW2639 

5001341–029 .... 5001341–022 JW2760 

5001341–030 .... 5001341–022 JW2792 

5001341–031 .... 5001341–022 MO579 

5001341–032 .... 5001341–022 MG2825 

5001341–033 .... 5001341–022 MG5477 

5001341–034 .... 5001341–022 ND5917 

The added part SNs are as follows: 

PNs Added 

SNs 

5001341–022 ........................ JW4713 

5001341–022 ........................ MG6743 

5001341–022 ........................ ND6924 

831021–003 .......................... ND9177 

PNs Added 

SNs 

831021–003 .......................... ND9496 

831021–003 .......................... NS7894 

831021–003 .......................... NS8559 

831021–003 .......................... NS9072 

804121 .................................. PX3805 

804121 .................................. PX4266 

Conclusion 

We have carefully reviewed the 

available data, including the comments 

received, and determined that air safety 

and the public interest require 

proposing this AD with the changes 

described previously. We have 

determined that these changes will 

neither increase the economic burden 

on any operator nor increase the scope 

of the proposed AD. 

FAA’s Determination and Requirements 

of the Proposed AD 

We have evaluated all pertinent 

information and identified an unsafe 

condition that is likely to exist or 

develop on other products of this same 

type design. For that reason, we are 

proposing this AD, which would 

require: 

• Checking the 1st stage fan blade for 

a circled, letter I, on the approved 

marking area of the outboard side of the 

blade platform. If the blade has this 

marking, no further action is required. 

• Removing 1st stage fan blades 

without a circled, letter I, on the 

approved marking area of the outboard 

side of the blade platform if installed; 

and 

• Inspecting the 1st stage fan blade 

root thickness; and 

• Returning to service 1st stage fan 

blades that pass the inspection, after 

properly marking the blade. 

Costs of Compliance 

We estimate that this proposed AD 

would affect 531 1st stage fan blades 

installed on JT9D–7R4 turbofan engines 

installed on airplanes of U.S. registry. 

We also estimate that it would take 

about 0.5 work-hour per 1st stage fan 

blade to perform the proposed actions, 

and that the average labor rate is $80 per 

work-hour. Based on these figures, we 

estimate the total cost of the proposed 

AD to U.S. operators to be $21,240. 

Authority for This Rulemaking 

Title 49 of the United States Code 

specifies the FAA’s authority to issue 

rules on aviation safety. Subtitle I, 

Section 106, describes the authority of 

the FAA Administrator. Subtitle VII, 

Aviation Programs, describes in more 

detail the scope of the Agency’s 

authority. 


rmajette on PROD1PC67 with PROPOSALS
9278 Federal Register / Vol. 72, No. 40 / Thursday, March 1, 2007 / Proposed Rules 

We are issuing this rulemaking under 

the authority described in Subtitle VII, 

Part A, Subpart III, Section 44701, 

‘‘General requirements.’’ Under that 

section, Congress charges the FAA with 

promoting safe flight of civil aircraft in 

air commerce by prescribing regulations 

for practices, methods, and procedures 

the Administrator finds necessary for 

safety in air commerce. This regulation 

is within the scope of that authority 

because it addresses an unsafe condition 

that is likely to exist or develop on 

products identified in this rulemaking 

action. 

Regulatory Findings 

We have determined that this 

proposed AD would not have federalism 

implications under Executive Order 

13132. This proposed AD would not 

have a substantial direct effect on the 

States, on the relationship between the 

national Government and the States, or 

on the distribution of power and 

responsibilities among the various 

levels of government. 

For the reasons discussed above, I 

certify that the proposed AD: 

1. Is not a ‘‘significant regulatory 

action’’ under Executive Order 12866; 

2. Is not a ‘‘significant rule’’ under the 

DOT Regulatory Policies and Procedures 

(44 FR 11034, February 26, 1979); and 

3. Would not have a significant 

economic impact, positive or negative, 

on a substantial number of small entities 

under the criteria of the Regulatory 

Flexibility Act. 

We prepared a regulatory evaluation 

of the estimated costs to comply with 

this proposed AD. See the ADDRESSES

section for a location to examine the 

regulatory evaluation. 

List of Subjects in 14 CFR Part 39 

Air transportation, Aircraft, Aviation 

safety, Safety. 

The Proposed Amendment 

Under the authority delegated to me 

by the Administrator, the Federal 

Aviation Administration proposes to 

amend 14 CFR part 39 as follows: 

PART 39—AIRWORTHINESS 

DIRECTIVES 

1. The authority citation for part 39 

continues to read as follows: 

Authority: 49 U.S.C. 106(g), 40113, 44701. 

§ 39.13 [Amended] 

2. The FAA amends § 39.13 by 

removing Amendment 39–14430 (70 FR 

76381, December 27, 2005), and by 

adding a new airworthiness directive to 

read as follows: 

Pratt & Whitney: Docket No. FAA–2005–

23072; Directorate Identifier 2005–NE–

38–AD. 

Comments Due Date 

(a) The Federal Aviation Administration 

(FAA) must receive comments on this 

airworthiness directive (AD) action by April 

30, 2007. 

Affected ADs 

(b) This AD supersedes AD 2005–26–09. 

Applicability 

(c) This AD applies to Pratt & Whitney 

(PW) JT9D–7R4 turbofan engines. These 

engines are installed on, but not limited to, 

Airbus A300 and A310, and Boeing 747 and 

767 airplanes. 

Unsafe Condition 

(d) This AD results from the discovery of 

inaccurate part quantity, part numbers, and 

serial numbers used in AD 2005–26–09. We 

are issuing this AD to prevent 1st stage fan 

blade fracture and uncontained engine 

failure, resulting in possible damage to the 

airplane. 

Compliance 

(e) You are responsible for having the 

actions required by this AD performed within 

the compliance times specified unless the 

actions have already been done. 

(f) For 1st stage fan blades that are listed 

by part number (P/N) and serial number (SN) 

in Table 1 of this AD, do the following: 

TABLE 1.—AFFECTED 1ST STAGE FAN

BLADES

P/Ns SNs 

5001341–022 ................................ JW2804 

5001341–022 ................................ JW0354 

5001341–022 ................................ ND5746 

5001341–022 ................................ ND5770 

5001341–022 ................................ JW3992 

5001341–022 ................................ ND8615 

5001341–022 ................................ JW0442 

5001341–022 ................................ JW2317 

5001341–022 ................................ ND8631 

5001341–022 ................................ ND8635 

5001341–022 ................................ JW4624 

5001341–022 ................................ NE0394 

5001341–022 ................................ NE0153 

5001341–022 ................................ NN8054 

5001341–022 ................................ JW4693 

5001341–022 ................................ ND7304 

5001341–022 ................................ MG6108 

5001341–022 ................................ MG5862 

5001341–022 ................................ MG5619 

5001341–022 ................................ NE0308 

5001341–022 ................................ NE0200 

5001341–022 ................................ MG6797 

5001341–022 ................................ JW0230 

5001341–022 ................................ ND5652 

5001341–022 ................................ ND5775 

5001341–022 ................................ JW0251 

5001341–022 ................................ ND5719 

5001341–022 ................................ JW0248 

5001341–022 ................................ ND5785 

5001341–022 ................................ ND5676 

5001341–022 ................................ ND5661 

5001341–022 ................................ JW0265 

5001341–022 ................................ ND5699 

TABLE 1.—AFFECTED 1ST STAGE FAN

BLADES—Continued 

P/Ns SNs 

5001341–022 ................................ ND5767 

5001341–022 ................................ JW0259 

5001341–022 ................................ ND5680 

5001341–022 ................................ ND5749 

5001341–022 ................................ JW0235 

5001341–022 ................................ ND5776 

5001341–022 ................................ ND8580 

5001341–022 ................................ MG6039 

5001341–022 ................................ ND9127 

5001341–022 ................................ JW4287 

5001341–022 ................................ JW0262 

5001341–022 ................................ JW0445 

5001341–022 ................................ JW4665 

5001341–022 ................................ MG5901 

5001341–022 ................................ NE0303 

5001341–022 ................................ ND8703 

5001341–022 ................................ JW4574 

5001341–022 ................................ JW4286 

5001341–022 ................................ JW4491 

5001341–022 ................................ JW4630 

5001341–022 ................................ JW4391 

5001341–022 ................................ MG6550 

5001341–022 ................................ MG6776 

5001341–022 ................................ JW4586 

5001341–022 ................................ JW0352 

5001341–022 ................................ JW4261 

5001341–022 ................................ MG6135 

5001341–022 ................................ JW4685 

5001341–022 ................................ MG6772 

5001341–022 ................................ MG6793 

5001341–022 ................................ MG7111 

5001341–022 ................................ ND8618 

5001341–022 ................................ JW0644 

5001341–022 ................................ JW4631 

5001341–022 ................................ JW4651 

5001341–022 ................................ JW0234 

5001341–022 ................................ JW4646 

804121 .......................................... NN9016 

804121 .......................................... VJ3393 

804121 .......................................... PX3694 

804121 .......................................... RK9168 

804121 .......................................... PX5023 

804121 .......................................... VJ3324 

804121 .......................................... VJ3504 

804121 .......................................... NN9115 

804121 .......................................... NN8936 

804121 .......................................... PX3816 

804121 .......................................... VJ3412 

804121 .......................................... RK9163 

804121 .......................................... VJ3447 

804121 .......................................... RK9230 

804121 .......................................... RK9109 

804121 .......................................... PX4627 

804121 .......................................... RK8990 

804121 .......................................... SP9459 

804121 .......................................... RK8656 

804121 .......................................... NN8933 

804121 .......................................... VJ3444 

804121 .......................................... ND5864 

804121 .......................................... NN9020 

804121 .......................................... RK8905 

804121 .......................................... SR1733 

804121 .......................................... NN9047 

804121 .......................................... PX3692 

804121 .......................................... PX3786 

804121 .......................................... NN9025 

804121 .......................................... NN9007 

804121 .......................................... RK9100 

804121 .......................................... VJ3399 

804121 .......................................... PX4970 

804121 .......................................... PX5013 


rmajette on PROD1PC67 with PROPOSALS
Federal Register / Vol. 72, No. 40 / Thursday, March 1, 2007 / Proposed Rules 9279 

TABLE 1.—AFFECTED 1ST STAGE FAN

BLADES—Continued 

P/Ns SNs 

804121 .......................................... RK8904 

804121 .......................................... NN8986 

804121 .......................................... NN8829 

804121 .......................................... VJ3459 

804121 .......................................... RK9143 

804121 .......................................... VJ3414 

804121 .......................................... NN9028 

804121 .......................................... SP1557 

804121 .......................................... PX5003 

804121 .......................................... PX5042 

804121 .......................................... VJ3475 

804121 .......................................... ND7330 

804121 .......................................... PX3714 

831021–003 .................................. NS8913 

831021–003 .................................. ND6512 

831021–003 .................................. ND6941 

831021–003 .................................. ND9576 

831021–003 .................................. NS7555 

831021–003 .................................. NS8286 

831021–003 .................................. NS7447 

831021–003 .................................. ND6488 

831021–003 .................................. ND8296 

831021–003 .................................. ND6956 

831021–003 .................................. ND7879 

831021–003 .................................. ND6509 

831021–003 .................................. ND9814 

831021–003 .................................. NN7331 

831021–003 .................................. ND6991 

831021–003 .................................. ND6894 

831021–003 .................................. NS6413 

831021–003 .................................. ND7344 

831021–003 .................................. ND6947 

831021–003 .................................. NN8732 

831021–003 .................................. ND8536 

831021–003 .................................. ND6946 

831021–003 .................................. ND6723 

831021–003 .................................. ND9294 

831021–003 .................................. ND9290 

831021–003 .................................. ND6013 

831021–003 .................................. ND8937 

831021–003 .................................. NS7160 

831021–003 .................................. NS6435 

831021–003 .................................. NS6591 

831021–003 .................................. ND9558 

831021–003 .................................. NS8479 

831021–003 .................................. NS9382 

831021–003 .................................. ND8965 

831021–003 .................................. ND9837 

831021–003 .................................. ND5959 

831021–003 .................................. NS6491 

831021–003 .................................. NS9072 

831021–003 .................................. ND9625 

831021–003 .................................. ND6714 

831021–003 .................................. ND6820 

831021–003 .................................. ND8972 

831021–003 .................................. NE0286 

831021–003 .................................. NE0347 

831021–003 .................................. ND8010 

831021–003 .................................. ND8956 

831021–003 .................................. ND9535 

831021–003 .................................. ND9831 

831021–003 .................................. NE0227 

831021–003 .................................. ND8283 

831021–003 .................................. ND9730 

831021–003 .................................. NN7656 

831021–003 .................................. NS7775 

831021–003 .................................. ND9815 

831021–003 .................................. ND6135 

831021–003 .................................. NS8491 

831021–003 .................................. NS6395 

831021–003 .................................. NS8584 

TABLE 1.—AFFECTED 1ST STAGE FAN

BLADES—Continued 

P/Ns SNs 

831021–003 .................................. NN7272 

831021–003 .................................. MG7159 

831021–003 .................................. NS6592 

831021–003 .................................. ND7862 

831021–003 .................................. ND6684 

831021–003 .................................. NN7744 

831021–003 .................................. ND7480 

831021–003 .................................. ND7873 

831021–003 .................................. ND6827 

831021–003 .................................. ND6576 

831021–003 .................................. ND9261 

831021–003 .................................. NS8686 

831021–003 .................................. ND9052 

831021–003 .................................. ND6897 

831021–003 .................................. ND6565 

831021–003 .................................. NN8966 

831021–003 .................................. PX3707 

831021–003 .................................. NS7031 

831021–003 .................................. ND6584 

831021–003 .................................. ND9883 

831021–003 .................................. NS6535 

831021–003 .................................. ND7852 

831021–003 .................................. ND9662 

831021–003 .................................. ND7871 

831021–003 .................................. JW0106 

831021–003 .................................. ND8305 

831021–003 .................................. NS6409 

831021–003 .................................. NE0442 

831021–003 .................................. ND9095 

831021–003 .................................. ND9302 

831021–003 .................................. ND9023 

831021–003 .................................. ND8009 

831021–003 .................................. ND8477 

831021–003 .................................. ND7492 

831021–003 .................................. ND8776 

831021–003 .................................. ND6524 

831021–003 .................................. ND6704 

831021–003 .................................. ND8911 

831021–003 .................................. ND8789 

831021–003 .................................. ND8798 

831021–003 .................................. ND6407 

831021–003 .................................. ND7668 

831021–003 .................................. ND9179 

831021–003 .................................. NE0421 

831021–003 .................................. ND6513 

831021–003 .................................. ND6744 

831021–003 .................................. ND7654 

831021–003 .................................. ND7870 

831021–003 .................................. ND9759 

831021–003 .................................. ND6561 

831021–003 .................................. ND5826 

831021–003 .................................. ND6031 

831021–003 .................................. ND8714 

831021–003 .................................. ND8872 

831021–003 .................................. ND6678 

831021–003 .................................. ND6629 

831021–003 .................................. ND8995 

831021–003 .................................. NE0302 

831021–003 .................................. ND6405 

831021–003 .................................. NS8300 

831021–003 .................................. NS8769 

831021–003 .................................. NS7147 

831021–003 .................................. ND6649 

831021–003 .................................. ND7766 

831021–003 .................................. NS7864 

831021–003 .................................. NS8734 

831021–003 .................................. ND6677 

831021–003 .................................. NS7911 

831021–003 .................................. ND8205 

831021–003 .................................. ND8804 

831021–003 .................................. ND6639 

TABLE 1.—AFFECTED 1ST STAGE FAN

BLADES—Continued 

P/Ns SNs 

831021–003 .................................. ND8994 

831021–003 .................................. ND7275 

831021–003 .................................. ND9195 

831021–003 .................................. ND6178 

831021–003 .................................. ND8639 

831021–003 .................................. ND9760 

831021–003 .................................. ND9108X 

831021–003 .................................. ND6427 

831021–003 .................................. ND6590 

831021–003 .................................. NS6551 

831021–003 .................................. JW1158 

831021–003 .................................. ND6412 

831021–003 .................................. ND7922 

831021–003 .................................. NS8678 

831021–003 .................................. ND8930 

831021–003 .................................. ND6596 

831021–003 .................................. ND9570 

831021–003 .................................. NN9027 

831021–003 .................................. ND6446 

831021–003 .................................. NE0275 

831021–003 .................................. ND9917 

831021–003 .................................. NS7919 

831021–003 .................................. NS7907 

831021–003 .................................. ND6583 

831021–003 .................................. NN7420 

831021–003 .................................. ND7746 

831021–003 .................................. ND8187 

831021–003 .................................. NN8999 

831021–003 .................................. ND6043 

831021–003 .................................. ND7880 

831021–003 .................................. NN7175 

831021–003 .................................. ND9816 

831021–003 .................................. ND8174 

831021–003 .................................. ND6045 

831021–003 .................................. NS7562 

831021–003 .................................. JW0075 

831021–003 .................................. ND6848 

831021–003 .................................. ND8531 

831021–003 .................................. ND6311 

831021–003 .................................. ND8144 

831021–003 .................................. ND5798 

831021–003 .................................. ND8113 

831021–003 .................................. ND9642 

831021–003 .................................. ND7436 

831021–003 .................................. ND9054 

831021–003 .................................. ND9683 

831021–003 .................................. ND5991 

831021–003 .................................. ND6026 

831021–003 .................................. ND6616 

831021–003 .................................. ND6530 

831021–003 .................................. NE0374 

831021–003 .................................. ND6364 

831021–003 .................................. ND7718 

831021–003 .................................. ND6473 

831021–003 .................................. ND6436 

831021–003 .................................. ND6887 

831021–003 .................................. ND6518 

831021–003 .................................. ND6479 

831021–003 .................................. NS6330 

831021–003 .................................. ND7264 

831021–003 .................................. ND8151 

831021–003 .................................. ND6562 

831021–003 .................................. NS8776 

831021–003 .................................. ND6519 

831021–003 .................................. ND7659 

831021–003 .................................. NS9049 

831021–003 .................................. NS6861 

831021–003 .................................. ND9571 

831021–003 .................................. ND9346 

831021–003 .................................. ND6501 

831021–003 .................................. NS8505 


rmajette on PROD1PC67 with PROPOSALS
9280 Federal Register / Vol. 72, No. 40 / Thursday, March 1, 2007 / Proposed Rules 

TABLE 1.—AFFECTED 1ST STAGE FAN

BLADES—Continued 

P/Ns SNs 

831021–003 .................................. ND9338 

831021–003 .................................. ND9775 

831021–003 .................................. ND6485 

831021–003 .................................. ND7165 

831021–003 .................................. ND9371 

831021–003 .................................. ND9537 

831021–003 .................................. NS7889 

831021–003 .................................. ND7877 

831021–003 .................................. ND8670 

831021–003 .................................. ND9032 

831021–003 .................................. ND8781 

831021–003 .................................. ND8604 

831021–003 .................................. ND9329 

831021–003 .................................. ND9110 

831021–003 .................................. ND5997 

831021–003 .................................. ND6027 

831021–003 .................................. ND9589 

831021–003 .................................. ND6575 

831021–003 .................................. ND6592 

831021–003 .................................. ND6463 

831021–003 .................................. NS8583 

831021–003 .................................. NS8590 

831021–003 .................................. NS8567 

831021–003 .................................. NS6795 

831021–003 .................................. NS7110 

831021–003 .................................. NS6587 

831021–003 .................................. NS6404 

831021–003 .................................. ND6486 

5001341–022 ................................ JW0942 

5001341–022 ................................ ND9231 

5001341–022 ................................ JW4812 

5001341–022 ................................ ND6555 

5001341–022 ................................ M1375 

5001341–022 ................................ MG6627 

5001341–022 ................................ MG6794 

5001341–022 ................................ ND9399 

5001341–022 ................................ NE0084 

5001341–022 ................................ MG6252 

5001341–022 ................................ ND7422 

5001341–022 ................................ ND7043 

5001341–022 ................................ MG5722 

5001341–022 ................................ MG5918 

5001341–022 ................................ ND6984 

5001341–022 ................................ M0839 

5001341–022 ................................ M0922 

5001341–022 ................................ M0938 

5001341–022 ................................ M1117 

5001341–022 ................................ M0307 

5001341–022 ................................ JW3871 

5001341–022 ................................ M1125 

5001341–022 ................................ M1149 

5001341–022 ................................ JW2681 

5001341–022 ................................ M0270 

5001341–022 ................................ M1120 

5001341–022 ................................ M0205 

5001341–022 ................................ AE9352 

5001341–022 ................................ JW3492 

5001341–022 ................................ ND6148 

5001341–022 ................................ ND8907 

5001341–022 ................................ M1235 

5001341–022 ................................ MG5585 

5001341–022 ................................ ND8436 

5001341–022 ................................ MG5696 

5001341–022 ................................ ND8704 

5001341–022 ................................ JW2284 

5001341–022 ................................ JW2313 

5001341–022 ................................ JW2498 

5001341–022 ................................ JW2541 

5001341–022 ................................ JW2560 

5001341–022 ................................ JW2589 

5001341–022 ................................ JW2639 

TABLE 1.—AFFECTED 1ST STAGE FAN

BLADES—Continued 

P/Ns SNs 

5001341–022 ................................ JW2760 

5001341–022 ................................ JW2792 

5001341–022 ................................ M0579 

5001341–022 ................................ MG2825 

5001341–022 ................................ MG5477 

5001341–022 ................................ ND5917 

5001341–022 ................................ JW1976 

5001341–022 ................................ JW2653 

5001341–022 ................................ JW2608 

5001341–022 ................................ JW2727 

5001341–022 ................................ JW2764 

5001341–022 ................................ JW2265 

5001341–022 ................................ JW2474 

5001341–022 ................................ JW2396 

5001341–022 ................................ JW3554 

5001341–022 ................................ JW2667 

5001341–022 ................................ MG2302 

5001341–022 ................................ MG3972 

5001341–022 ................................ JW3930 

5001341–022 ................................ ND6749 

5001341–022 ................................ M1172 

5001341–022 ................................ JW2104 

5001341–022 ................................ JW2519 

5001341–022 ................................ JW2640 

5001341–022 ................................ JW2517 

5001341–022 ................................ JW2663 

5001341–022 ................................ JW2823 

5001341–022 ................................ M0536 

5001341–022 ................................ JW2725 

5001341–022 ................................ MG5917 

5001341–022 ................................ JW0681 

5001341–022 ................................ JW0711 

5001341–022 ................................ JW0740 

5001341–022 ................................ JW0807 

5001341–022 ................................ JW1089 

5001341–022 ................................ JW1362 

5001341–022 ................................ JW2065 

5001341–022 ................................ MG2434 

5001341–022 ................................ MG2846 

5001341–022 ................................ JW0806 

804121 .......................................... NN9854 

804121 .......................................... NN9024 

804121 .......................................... NN9032 

804121 .......................................... PX5029 

804121 .......................................... NN9050 

804121 .......................................... NS8242 

804121 .......................................... NS8260 

804121 .......................................... PX4273 

804121 .......................................... PX4378 

804121 .......................................... RL0857 

804121 .......................................... RX8763 

804121 .......................................... NS8331 

804121 .......................................... NN9824 

804121 .......................................... MG6979 

804121 .......................................... MG7023 

804121 .......................................... MG7055 

804121 .......................................... RK8914 

804121 .......................................... RL0023 

804121 .......................................... PX4328 

804121 .......................................... RK9008 

804121 .......................................... TG1506 

804121 .......................................... KK8226 

804121 .......................................... MG2604 

804121 .......................................... NS6691 

804121 .......................................... RK8968 

804121 .......................................... NN9917 

804121 .......................................... RK7824 

804121 .......................................... M1343 

804121 .......................................... NS6559 

804121 .......................................... NS7767 

804121 .......................................... NE0363 

TABLE 1.—AFFECTED 1ST STAGE FAN

BLADES—Continued 

P/Ns SNs 

804121 .......................................... PX3771 

804121 .......................................... NN9972 

804121 .......................................... RL0460 

804121 .......................................... RK8310 

804121 .......................................... SR2115 

804121 .......................................... TG2826 

804121 .......................................... PX5018 

804121 .......................................... PX5002 

831021–003 .................................. ND7627 

831021–003 .................................. ND6890 

831021–003 .................................. ND7461 

831021–003 .................................. ND9616 

831021–003 .................................. NE0413 

831021–003 .................................. NS8825 

831021–003 .................................. NS6350 

831021–003 .................................. NS7168 

831021–003 .................................. NS7705 

831021–003 .................................. NS7848 

831021–003 .................................. ND9128 

831021–003 .................................. ND9541 

831021–003 .................................. ND9671 

831021–003 .................................. ND9684 

831021–003 .................................. NE0277 

831021–003 .................................. NE0384 

831021–003 .................................. NE0396 

831021–003 .................................. ND6421 

831021–003 .................................. ND6599 

831021–003 .................................. ND6614 

831021–003 .................................. ND7847 

831021–003 .................................. ND8346 

831021–003 .................................. ND8853 

831021–003 .................................. ND8915 

831021–003 .................................. NS8719 

831021–003 .................................. NS8838 

831021–003 .................................. NT0169 

831021–003 .................................. NS9584 

831021–003 .................................. ND6445 

831021–003 .................................. ND6834 

831021–003 .................................. ND7467 

831021–003 .................................. ND8887 

831021–003 .................................. ND6520 

831021–003 .................................. NS8611 

831021–003 .................................. NS7640 

831021–003 .................................. NN7037 

831021–003 .................................. NN7590 

831021–003 .................................. NN8120 

831021–003 .................................. NN8573 

831021–003 .................................. NN9719 

831021–003 .................................. NS8784 

831021–003 .................................. TB6B367 

831021–003 .................................. NN9557 

831021–003 .................................. NN9710 

831021–003 .................................. NS8374 

831021–003 .................................. NS8770 

831021–003 .................................. NS9022 

831021–003 .................................. NS8416 

831021–003 .................................. NS6474 

831021–003 .................................. ND8912 

831021–003 .................................. NT0108 

831021–003 .................................. NS8836 

831021–003 .................................. NN8310 

831021–003 .................................. NS8559 

5001341–022 ................................ JW4713 

5001341–022 ................................ MG6743 

5001341–022 ................................ ND6924 

831021–003 .................................. ND9177 

831021–003 .................................. ND9496 

831021–003 .................................. NS7894 

831021–003 .................................. NS8559 

831021–003 .................................. NS9072 

804121 .......................................... PX3805 


rmajette on PROD1PC67 with PROPOSALS
Federal Register / Vol. 72, No. 40 / Thursday, March 1, 2007 / Proposed Rules 9281 

1There are a variety of technologies in various 

stages of development to produce electric power 

using ocean currents, tides, and wave action, rather 

than the traditional hydropower model involving 

hydraulic head developed by use of a dam or other 

diversion structure. For purposes of this notice of 

inquiry, the Commission refers to these newer 

forms of technology as ‘‘wave, current, and instream 

new technology’’ or simply ‘‘new technology.’’

However, the Commission is using the terms as 

shorthand, and is not attempting to define or limit 

the scope of these technologies. 

2See Hydroelectric Infrastructure Technical 

Conference, Docket No. AD06–13–000 (December 6, 

2006), transcript at 12; 22 (testimony of George 

Hagerman). 

3For example, in Verdant, Power, LLC, 111 FERC 

¶61,024, on reh’g, 112 FERC ¶61,143 (2005), the 

Continued 

TABLE 1.—AFFECTED 1ST STAGE FAN

BLADES—Continued 

P/Ns SNs 

804121 .......................................... PX4266 

For Engines Installed on an Airplane 

(1) For engines installed on an airplane 

with affected 1st stage fan blades installed, 

perform the actions in paragraphs (f)(3) 

through (f)(6)(ii) of this AD at the next 1st 

stage fan blade exposure. 

For Engines Not Installed on an Airplane, or, 

for Affected 1st Stage Fan Blades Not 

Installed in an Engine 

(2) For engines not installed on an airplane 

with affected 1st stage fan blades installed, 

or, for affected 1st stage fan blades not 

installed in an engine, paragraph (h) of this 

AD applies. 

1st Stage Fan Blade Check 

(3) Check the 1st stage fan blade for a 

circled, letter I, on the approved marking area 

of the outboard side of the blade platform. If 

the blade has this marking, no further action 

is required. 

(4) Remove 1st stage fan blades without a 

circled, letter I, on the approved marking area 

of the outboard side of the blade platform, if 

installed. 

(5) Inspect the 1st stage fan blade root 

thickness. You can find information on 

inspecting the blade root thickness in PW 

Engine Manual Section 72–31–02, Inspect-01, 

and Repair-23. 

(6) For 1st stage fan blades that pass the 

inspection referenced in paragraph (f)(5) of 

this AD: 

(i) Vibropeen the letter I and a circle 

around that letter, on the approved marking 

area of the outboard side of the blade 

platform. You can find information on 

approved blade marking in the JT9D–7R4 

Engine Manual, Section 72–31–02, Typical 

Repair–13, Mark Repair Codes. 

(ii) Return the 1st stage fan blades to 

service. 

Definition 

(g) For the purposes of paragraph (f)(1) of 

this AD, next 1st stage fan blade exposure is: 

(1) When any 1st stage fan blade is 

removed from the engine; or 

(2) When the 1st stage fan hub is removed 

from the engine. 

Prohibited Installation 

(h) After the effective date of this AD, do 

not install any 1st stage fan blades listed in 

Table 1 of this AD on any airplane, unless 

the actions of this AD have been done to the 

1st stage fan blades. 

Alternative Methods of Compliance 

(i) The Manager, Engine Certification 

Office, has the authority to approve 

alternative methods of compliance for this 

AD if requested using the procedures found 

in 14 CFR 39.19. 

Related Information 

(j) None. 

Issued in Burlington, Massachusetts, on 

February 23, 2007. 

Peter A. White, 

Acting Manager, Engine and Propeller 

Directorate, Aircraft Certification Service. 

[FR Doc. E7–3561 Filed 2–28–07; 8:45 am] 

BILLING CODE 4910–13–P 

DEPARTMENT OF ENERGY 

Federal Energy Regulatory 

Commission 

18 CFR Chapter I 

[Docket No. RM07–08–000] 

Preliminary Permits for Wave, Current, 

and Instream New Technology 

Hydropower Projects 

February 15, 2007. 

AGENCY: Federal Energy Regulatory 

Commission, DOE. 

ACTION: Notice of Inquiry (NOI) and 

Interim Statement of Policy. 

SUMMARY: The Federal Energy 

Regulatory Commission (Commission) is 

inviting comments on its procedures 

with respect to the treatment of 

preliminary permits under Part I of the 

Federal Power Act for wave, current, 

and instream new technology 

hydropower projects. 

DATES: Comments on this NOI are due 

on April 30, 2007. 

ADDRESSES: You may submit comments 

identified by Docket No. RM07–8–000, 

by one of the following methods: 

• Agency Web Site: http://ferc.gov. 

Follow the instructions for submitting 

comments via the eFiling link found in 

the Comment Procedures Section of the 

preamble. 

• Mail: Commenters unable to file 

comments electronically must mail or 

hand deliver an original and 14 copies 

of their comments to the Federal Energy 

Regulatory Commission, Office of the 

Secretary, 888 First Street, NE., 

Washington, DC 20426. Please refer to 

the Comment Procedures Section of the 

preamble for additional information on 

how to file paper comments. 

FOR FURTHER INFORMATION CONTACT: 

William Guey-Lee, Office of Energy 

Projects, Federal Energy Regulatory 

Commission, 888 First Street, NE., 

Washington, DC 20426, (202) 502–

6064. 

Merrill Hathaway, (Legal Information), 

Office of General Counsel—Energy 

Projects, Federal Energy Regulatory 

Commission, 888 First Street, NE., 

Washington, DC 20426, (202) 502- 

8825. 

SUPPLEMENTARY INFORMATION: 

Introduction 

1. The Federal Energy Regulatory 

Commission (Commission) is issuing 

this Notice of Inquiry to seek comments 

on how it should treat applications for 

preliminary permits to study 

hydropower projects involving 

proposals to utilize wave, current, and 

instream new technology methods to 

develop hydropower.1 The Commission 

is also seeking comments on how it 

should oversee any such permits during 

their terms. Finally, the Commission 

also sets an interim policy pending the 

outcome of this proceeding. 

2. The Commission has seen 

increasing interest in new hydroelectric 

technologies that would utilize ocean 

waves, tides, and currents from freeflowing rivers, as evidenced by a surge 

in applications for preliminary permits 

to study such projects. Commission staff 

has issued 11 preliminary permits for 

projects of this type; three are for 

proposed tidal energy projects (in New 

York, Washington, and California), and 

eight are for proposed ocean current 

energy projects (off the coast of Florida). 

Over 40 preliminary permit applications 

for ocean projects are currently pending 

before the Commission, all of which 

have been filed since March 2006. 

3. These new technologies have 

significant potential: it has been 

estimated that the potential for wave 

and current power could be over 350- 

terawatt hours per year, which would 

more than double current hydropower 

production.2 The Commission 

anticipates further exploration of how 

these technologies can fit within the 

national energy infrastructure in terms 

of the amount of potential energy that 

can be developed, its reliability, 

environmental and safety implications, 

and its commercial viability. The 

Commission wants to reduce regulatory 

barriers to the development of new 

technologies, where possible, and has 

exhibited the maximum flexibility 

permitted by law in regulating these 

projects.3


rmajette on PROD1PC67 with PROPOSALS