Federal Register / Vol. 87, No. 48 / Friday, March 11, 2022 / Rules and Regulations 13923 

Patrick Mullen, 

Manager, Technical Innovation Policy 

Branch, Policy and Innovation Division, 

Aircraft Certification Service. 

[FR Doc. 2022–04845 Filed 3–10–22; 8:45 am] 

BILLING CODE 4910–13–P 

DEPARTMENT OF TRANSPORTATION 

Federal Aviation Administration 

14 CFR Part 39 

[Docket No. FAA–2021–0959; Project 

Identifier AD–2021–00830–E; Amendment 

39–21975; AD 2022–06–09] 

RIN 2120–AA64 

Airworthiness Directives; Pratt & 

Whitney Division Turbofan Engines 

AGENCY: Federal Aviation 

Administration (FAA), DOT. 

ACTION: Final rule. 

SUMMARY: The FAA is superseding 

Airworthiness Directive (AD) 2019–03– 

01 and AD 2021–05–51 for certain Pratt 

& Whitney Division (PW) PW4074, 

PW4074D, PW4077, PW4077D, 

PW4084D, PW4090, and PW4090–3 

model turbofan engines. AD 2019–03– 

01 required performing initial and 

repetitive thermal acoustic image (TAI) 

inspections for cracks in certain 1ststage low-pressure compressor (LPC) 

blades and removal of those blades that 

fail inspection. AD 2021–05–51 required 

performing a one-time TAI inspection 

for cracks in certain 1st-stage LPC 

blades and removal of those blades that 

fail inspection. This AD was prompted 

by three in-flight failures of a 1st-stage 

LPC blade, with one failure resulting in 

an engine fire during flight, and 

subsequent manufacturer publication of 

service information specifying improved 

inspections for three critical locations 

on the 1st-stage LPC blade. This AD 

requires initial and repetitive ultrasonic 

(UT) inspections and TAI inspections 

for cracks in certain 1st-stage LPC 

blades and removal of those blades that 

fail inspection. The FAA is issuing this 

AD to address the unsafe condition on 

these products. 

DATES: This AD is effective April 15, 

2022. 

The Director of the Federal Register 

approved the incorporation by reference 

of a certain publication listed in this AD 

as of April 15, 2022. 

ADDRESSES: For service information 

identified in this final rule, contact Pratt 

& Whitney Division, 400 Main Street, 

East Hartford, CT 06118; phone: (860) 

565–0140; email: help24@

prattwhitney.com; website: https://

connect.prattwhitney.com. You may 

view this service information at the 

FAA, Airworthiness Products Section, 

Operational Safety Branch, 1200 District 

Avenue, Burlington, MA 01803. For 

information on the availability of this 

material at the FAA, call (817) 222– 

5110. It is also available at https://

www.regulations.gov by searching for 

and locating Docket No. FAA–2021– 

0959. 

Examining the AD Docket 

You may examine the AD docket at 

https://www.regulations.govby 

searching for and locating Docket No. 

FAA–2021–0959; or in person at Docket 

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

Monday through Friday, except Federal 

holidays. The AD docket contains this 

final rule, any comments received, and 

other information. The address for 

Docket Operations is U.S. Department of 

Transportation, Docket Operations, M– 

30, West Building Ground Floor, Room 

W12–140, 1200 New Jersey Avenue SE, 

Washington, DC 20590. 

FOR FURTHER INFORMATION CONTACT: 

Carol Nguyen, Aviation Safety Engineer, 

ECO Branch, FAA, 1200 District 

Avenue, Burlington, MA 01803; phone: 

(781) 238–7655; fax: (781) 238–7199; 

email: carol.nguyen@faa.gov. 

SUPPLEMENTARY INFORMATION: 

Background 

The FAA issued a notice of proposed 

rulemaking (NPRM) to amend 14 CFR 

part 39 to supersede AD 2019–03–01, 

Amendment 39–19553 (84 FR 4320, 

February 15, 2019) (AD 2019–03–01), 

and AD 2021–05–51, Amendment 39– 

21470 (86 FR 13445, March 9, 2021) (AD 

2021–05–51). AD 2019–03–01 and AD 

2021–05–51 applied to certain PW 

PW4074, PW4074D, PW4077, 

PW4077D, PW4084D, PW4090, and 

PW4090–3 model turbofan engines. The 

NPRM published in the Federal 

Register on December 28, 2021 (86 FR 

73699). The NPRM was prompted by the 

manufacturer developing an improved 

UT inspection for the three critical 

locations on the 1st-stage LPC blade, 

two at the mid span region of the blade 

and one at the flow path region of the 

blade, following three in-flight failures 

of a 1st-stage LPC blade, with one 

failure resulting in an engine fire during 

flight. The manufacturer published Pratt 

& Whitney Alert Service Bulletin (ASB) 

PW4G–112–A72–361, dated October 15, 

2021, which provides instructions for 

performing both the improved UT 

inspection and the TAI inspection. The 

manufacturer also determined that it 

was necessary to adjust the initial TAI 

inspection threshold and lower the 

repetitive TAI inspection interval on the 

1st-stage LPC blades to address the 

unsafe condition. In the NPRM, the FAA 

proposed to require initial and 

repetitive UT inspections and TAI 

inspections for cracks in certain 1ststage LPC blades and removal of those 

blades that fail inspection. 

Discussion of Final Airworthiness 

Directive 

Comments 

The FAA received comments from 

five commenters. The commenters were 

Air Line Pilots Association, 

International (ALPA), All Nippon 

Airways (ANA), The Boeing Company 

(Boeing), Japan Airlines (JAL), and 

United Airlines (UAL). The following 

presents the comments received on the 

NPRM and the FAA’s response to each 

comment. 

Request To Revise Note and Add 

Additional Note in Required Actions 

UAL requested that the FAA revise 

Note 2 to paragraph (g)(1)(ii) of the 

NPRM [Note 1 to paragraph (g)(1)(ii) of 

this AD] to ‘‘The FAA-approved TAI 

inspection method and the vendors that 

can perform the FAA-approved TAI 

inspection are specified in the 

Accomplishment Instructions section 

and Vendor Services section of PW4G– 

112–A72–361, respectively.’’ UAL also 

requested that the FAA add the same 

note to paragraph (g)(2)(iii) of this AD. 

The FAA agrees and revised Note 1 to 

paragraph (g)(1)(ii) of this AD and added 

Note 2 to paragraph (g)(2)(iii) to this AD, 

as requested by UAL. 

Request To Change the Initial 

Compliance Time to Before Revenue 

Flight 

ANA requested that the FAA change 

the Required Actions, paragraph (g)(1) 

Initial 1st-stage LPC Blade Inspections, 

from ‘‘before further flight after the 

effective of this AD’’ to ‘‘before the next 

revenue flight’’ to clarify the ferry flight 

requirement. 

Similarly, JAL requested the FAA 

change the Required Actions, paragraph 

(g)(1) Initial 1st-stage LPC Blade 

Inspections, from ‘‘before further flight 

after the effective of this AD’’ to ‘‘before 

the next revenue flight’’ or ‘‘before 

further flight except the ferry flight 

without passenger and cargos.’’ 

The FAA disagrees with changing the 

initial compliance in paragraph (g) of 

this AD as requested by ANA and JAL. 

The FAA has determined it is necessary 

to require certain actions prior to any 

flight, except as permitted in paragraph 

(i), Special Flight Permit, of this AD. 


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13924 Federal Register / Vol. 87, No. 48 / Friday, March 11, 2022 / Rules and Regulations 

Request To Add Aircraft Maintenance 

Manual Task to Special Flight Permit 

ANA and UAL requested that 

paragraph (h)(2) of the proposed AD 

(paragraph (i)(2) of this AD) include 

Task 29–11–00–710–806 of the Boeing 

777–200/300 Aircraft Maintenance 

Manual as an acceptable method for 

accomplishing the functional check of 

the left and right hydraulic pump 

shutoff valves. 

The FAA agrees and has added Task 

29–11–00–710–806 of the Boeing 777– 

200/300 Aircraft Maintenance Manual 

to Note 3 to paragraph (i)(2) of this AD 

as guidance for accomplishing the 

actions in paragraph (i)(2), Special 

Flight Permit, of this AD. 

Request To Add Certain Exceptions for 

Ferry Flights 

JAL requested that the FAA revise the 

AD to include certain exceptions for 

ferry flights. JAL stated it is planning to 

ferry affected airplanes to a storage 

point in the United States. JAL 

commented that although the local 

authority in Japan provides regulatory 

requirements for special flight 

permissions which are similar to 14 CFR 

21.197, Special flight permits, the 

Japanese regulatory requirements do not 

include ‘‘to a point of storage’’ language 

for the purpose of the flights. JAL 

proposed to add the following wording 

to paragraphs (c) and (g), Applicability 

and Required Actions, respectively, of 

this AD, ‘‘except for ferry flights, 

without passenger and cargo, of the 

airplanes on which the actions specified 

in paragraphs (h)(1) and (h)(2) of this 

AD [paragraphs (i)(1) and (2) of this AD] 

have been done.’’ 

The FAA disagrees with revising 

paragraph (c) Applicability or paragraph 

(g) Required Actions of this AD in 

response to JAL’s comment. Paragraph 

(i), Special Flight Permit, provides that 

special flight permits, as described in 14 

CFR 21.197 and 21.199, are permitted 

provided that the actions in paragraphs 

(i)(1) and (2) of this AD have first been 

accomplished. 14 CFR 21.197(a)(1) 

provides, in relevant part, that a special 

flight permit may be issued for flying 

the aircraft to a base where repairs, 

alterations, or maintenance are to be 

performed, or to a point of storage. The 

requested change is already permitted 

by this AD. The FAA did not change 

this AD as a result of this comment. 

Request To Provide a Threshold for the 

Special Flight Permit 

JAL and UAL requested that the FAA 

provide a threshold in paragraph (h)(1) 

of the proposed AD [paragraph (i)(1) of 

this AD] for the flow path UT inspection 

of the 1st-stage LPC blades for cracking 

prior to obtaining a special flight permit. 

JAL suggested a threshold of 275 flight 

cycles (FCs) since the last flow path UT 

inspection for 1st-stage LPC blades that 

have zero cycles since new (CSN) and 

also for 1st-stage LPC blades that have 

accumulated any number of CSN greater 

than zero. 

UAL stated that omitting a 

compliance time in paragraph (h) of the 

proposed AD for the special flight 

permits creates ambiguity regarding 

when and how often the flow path UT 

inspection is required for special flight 

permits. UAL suggested a threshold of 

275 FCs since the last flow path UT 

inspection. 

The FAA agrees to add a threshold of 

275 FCs to paragraph (i)(1) of this AD. 

This allows airplanes with 1st-stage LPC 

blades that have accumulated 275 CSN 

or fewer to be eligible for a special flight 

permit. 

Request To Define Part Eligible for 

Installation 

JAL requested that the FAA define the 

1st-stage LPC blade eligible for 

installation. 

The FAA agrees and added paragraph 

(h) to this AD to define a part eligible 

for installation. 

Request To Clarify the Use of Revised 

Non-Destructive Inspection Procedures 

(NDIPs) 

JAL requested clarification for the use 

of revised NDIPs for the flow path UT 

inspection of the 1st-stage LPC blades 

specified in paragraph (g)(1), (g)(2), and 

(h)(1) of the proposed AD (paragraph 

(g)(1), (g)(2), and (i)(1) of this AD). JAL 

commented that Pratt & Whitney ASB 

PW4G–112–A72–361, dated October 15, 

2021, references the UT inspection 

procedures in NDIP 1238, NDIP–1240, 

and NDIP–1241, which are currently at 

the original version. JAL asked if the 

submission of an alternative method of 

compliance (AMOC) request is 

necessary if the NDIPs are later revised 

to meet the requirements in paragraph 

(g)(1), (g)(2), and (h)(1) of the proposed 

AD (paragraph (g)(1), (g)(2), and (i)(1) of 

this AD). 

Pratt & Whitney Alert Service Bulletin 

PW4G–112–A72–361, dated October 15, 

2021, requires the latest FAA-approved 

revision of NDIP–1238, NDIP–1240, and 

NDIP–1241 at the time the initial 

inspection is accomplished. 

Furthermore, the FAA has provided 

credit for accomplishment of the flow 

path and mid span UT inspection 

identified in paragraph (g)(1), and (i)(1) 

of this AD using the service information 

specified in paragraph (j) of this AD. 

Support for the AD 

ALPA and Boeing expressed support 

for the AD as written. 

Conclusion 

The FAA reviewed the relevant data, 

considered any comments received, and 

determined that air safety requires 

adopting the AD as proposed. 

Accordingly, the FAA is issuing this AD 

to address the unsafe condition on these 

products. Except for minor editorial 

changes and any other changes 

described previously, this AD is 

adopted as proposed in the NPRM. 

None of the changes will increase the 

economic burden on any operator. 

Related Service Information Under 1 

CFR Part 51 

The FAA reviewed Pratt & Whitney 

ASB PW4G–112–A72–361, dated 

October 15, 2021. This ASB specifies 

procedures for performing the TAI and 

UT inspections of 1st-stage LPC blades. 

This service information is reasonably 

available because the interested parties 

have access to it through their normal 

course of business or by the means 

identified in ADDRESSES. 

Other Related Service Information 

The FAA reviewed ‘‘Engine-Driven 

Pump (EDP) Shutoff Valve Check’’ 

(Subtasks 26–21–00–200–018, 26–21– 

00–200–019, 26–21–00–840–022, and 

Task 29–11–00–710–806) of Boeing 

777–200/300 Aircraft Maintenance 

Manual, dated September 5, 2021. The 

service information specifies procedures 

for performing the engine-driven pump 

shutoff valve functional check. 

Costs of Compliance 

The FAA estimates that this AD 

affects 108 engines installed on 

airplanes of U.S. registry. 

The FAA estimates the following 

costs to comply with this AD: 


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Federal Register / Vol. 87, No. 48 / Friday, March 11, 2022 / Rules and Regulations 13925 

ESTIMATED COSTS

Action Labor cost Parts cost Cost per 

product 

Cost on U.S. 

operators 

Perform UT flow path inspection of 1st-stage 

LPC blades.

15 work-hours × $85 per hour = $1,275 ........ $0 $1,275 $137,700 

Perform UT mid span inspection of 1st-stage 

LPC blades.

30 work-hours × $85 per hour = $2,550 ........ 0 2,550 275,400 

Perform TAI inspection of 1st-stage LPC 

blades.

22 work-hours × $85 per hour = $1,870 ........ 0 1,870 201,960 

The FAA estimates the following 

costs to do any necessary replacement 

that would be required based on the 

results of the inspection. The agency has 

no way of determining the number of 

aircraft that might need this 

replacement: 

ON-CONDITION COSTS

Action Labor cost Parts cost Cost per 

product 

Replace 1st-stage LPC blade ...................................... 0 work-hours × $85 per hour = $0 ............................... $125,000 $125,000 

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. 

The FAA is 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 

The FAA has determined that this AD 

will not have federalism implications 

under Executive Order 13132. This AD 

will 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 this AD: 

(1) Is not a ‘‘significant regulatory 

action’’ under Executive Order 12866, 

(2) Will not affect intrastate aviation 

in Alaska, and 

(3) Will not have a significant 

economic impact, positive or negative, 

on a substantial number of small entities 

under the criteria of the Regulatory 

Flexibility Act. 

List of Subjects in 14 CFR Part 39 

Air transportation, Aircraft, Aviation 

safety, Incorporation by reference, 

Safety. 

The Amendment 

Accordingly, under the authority 

delegated to me by the Administrator, 

the FAA amends 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: 

■ a. Removing Airworthiness Directive 

(AD) 2019–03–01, Amendment 39– 

19553 (84 FR 4320, February 15, 2019), 

and AD 2021–05–51, Amendment 39– 

21470 (86 FR 13445, March 9, 2021); 

and 

■ b. Adding the following new 

airworthiness directive: 

2022–06–09 Pratt & Whitney Division: 

Amendment 39–21975; Docket No. 

FAA–2021–0959; Project Identifier AD– 

2021–00830–E. 

(a) Effective Date 

This airworthiness directive (AD) is 

effective April 15, 2022. 

(b) Affected ADs 

This AD replaces AD 2019–03–01, 

Amendment 39–19553 (84 FR 4320, February 

15, 2019), and AD 2021–05–51, Amendment 

39–21470 (86 FR 13445, March 9, 2021). 

(c) Applicability 

This AD applies to Pratt & Whitney 

Division (PW) PW4074, PW4074D, PW4077, 

PW4077D, PW4084D, PW4090, and PW4090– 

3 model turbofan engines, with a 1st-stage 

low-pressure compressor (LPC) blade, with 

part number 52A241, 55A801, 55A801–001, 

55A901, 55A901–001, 56A201, 56A201–001, 

or 56A221, installed. 

(d) Subject 

Joint Aircraft System Component (JASC) 

Code 7230, Turbine Engine Compressor 

Section. 

(e) Unsafe Condition 

This AD was prompted by three in-flight 

failures of a 1st-stage LPC blade, with one 

failure resulting in an engine fire during 

flight, and subsequent manufacturer 

publication of service information specifying 

improved inspections for three critical 

locations on the 1st-stage LPC blade. The 

FAA is issuing this AD to prevent failure of 

the 1st-stage LPC blades. The unsafe 

condition, if not addressed, could result in 

1st-stage LPC blade release, damage to the 

engine, and damage to the airplane. 

(f) Compliance 

Comply with this AD within the 

compliance times specified, unless already 

done. 

(g) Required Actions 

(1) Initial 1st-Stage LPC Blade Inspections 

(i) For 1st-stage LPC blades that have 

accumulated any number of cycles since new 

(CSN) greater than zero, before further flight 

after the effective date of this AD, perform a 

flow path and a mid span ultrasonic testing 

(UT) inspection of the 1st-stage LPC blades 

in accordance with the Accomplishment 

Instructions, Part A—Initial Inspection of All 

LPC Fan Blades Prior to Their Return to 

Service, paragraph 1.A. through C., of Pratt 

& Whitney Alert Service Bulletin (ASB) 

PW4G–112–A72–361, dated October 15, 2021 

(PW4G–112–A72–361). New 1st-stage LPC 


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13926 Federal Register / Vol. 87, No. 48 / Friday, March 11, 2022 / Rules and Regulations 

blades that have zero CSN do not need to 

undergo the initial 1st-stage LPC blade flow 

path and mid span UT inspection required by 

paragraph (g)(1)(i) of this AD, but must 

undergo the repetitive inspections of 

paragraph (g)(2) of this AD. 

(ii) Within the following compliance times 

after the effective date of this AD, perform a 

thermal acoustic image (TAI) inspection of 

the 1st-stage LPC blades for cracks using a 

method approved by the FAA: 

(A) For 1st-stage LPC blades with 1,000 

CSN or more, with no prior TAI inspection, 

inspect before further flight. 

(B) For 1st-stage LPC blades with 1,000 

flight cycles (FCs) or more since the last TAI 

inspection, inspect before further flight. 

(C) For 1st-stage LPC blades with fewer 

than 1,000 CSN, with no prior TAI 

inspection, inspect before accumulating 

1,000 CSN. 

(D) For 1st-stage LPC blades with fewer 

than 1,000 FCs since the last TAI inspection, 

inspect before accumulating 1,000 FCs since 

the last TAI inspection. 

Note 1 to paragraph (g)(1)(ii): The FAAapproved TAI inspection method and the 

vendors that can perform the FAA-approved 

TAI inspection are specified in the 

Accomplishment Instructions section and the 

Vendor Services section of PW4G–112–A72– 

361, respectively. 

(2) Repetitive 1st-Stage LPC Blade 

Inspections 

(i) Before exceeding 275 FCs since the last 

flow path UT inspection, and thereafter at 

intervals not exceeding 275 FCs since the last 

flow path UT inspection, perform a flow path 

UT inspection of the 1st-stage LPC blades in 

accordance with the Accomplishment 

Instructions, Part B—Repetitive Inspection of 

All LPC Fan Blades After Their Return to 

Service, paragraph 1.A., of PW4G–112–A72– 

361. 

(ii) Before exceeding 550 FCs since the last 

mid span UT inspection, and thereafter at 

intervals not exceeding 550 FCs since the last 

mid span UT inspection, perform a mid span 

UT inspection of the 1st-stage LPC blades in 

accordance with the Accomplishment 

Instructions, Part B—Repetitive Inspection of 

All LPC Fan Blades After Their Return to 

Service, paragraphs 1.B. and C., of PW4G– 

112–A72–361. 

(iii) Before exceeding 1,000 FCs since the 

last TAI inspection, and thereafter at 

intervals not exceeding 1,000 FCs since the 

last TAI inspection, perform repetitive TAI 

inspections of the 1st-stage LPC blades using 

a method approved by the FAA. 

Note 2 to paragraph (g)(2)(iii): The FAAapproved TAI inspection method and the 

vendors that can perform the FAA-approved 

TAI inspection are specified in the 

Accomplishment Instructions section and the 

Vendor Services section of PW4G–112–A72– 

361, respectively. 

(3) Removal of the 1st-Stage LPC Blade 

If any 1st-stage LPC blade fails any 

inspection required by paragraphs (g)(1) or 

(2) of this AD, before further flight, remove 

the 1st-stage LPC blade from service and 

replace with a part eligible for installation. 

(h) Definition 

For the purpose of this AD, a ‘‘part eligible 

for installation’’ is a new, zero CSN 1st-stage 

LPC blade or a 1st-stage LPC blade that has 

passed the inspections required by 

paragraphs (g)(1) and (2) of this AD, as 

applicable. 

(i) Special Flight Permit 

Special flight permits, as described in 14 

CFR 21.197 and 21.199, are permitted 

provided that the actions in paragraphs (i)(1) 

and (2) of this AD have first been 

accomplished. 

(1) A flow path UT inspection of the 1ststage LPC blades for cracking has been done 

within the last 275 FCs, as specified in the 

Accomplishment Instructions, Part A—Initial 

Inspection of All LPC Fan Blades Prior to 

their Return to Service, paragraph 1.A., of 

PW4G–112–A72–361, and the 1st-stage LPC 

blades have been found serviceable. This 

inspection is not required for 1st-stage LPC 

blades with 275 CSN or fewer. 

(2) A functional check of the left and right 

hydraulic pump shutoff valves to ensure they 

close in response to the corresponding engine 

fire handle input and all applicable 

corrective actions (i.e., repair) within 10 days 

prior to flight. 

Note 3 to paragraph (i)(2): Guidance for 

accomplishing the actions required by 

paragraph (i)(2) of this AD can be found in 

the ‘‘Engine-Driven Pump (EDP) Shutoff 

Valve Check’’ (Subtasks 26–21–00–200–018, 

26–21–00–200–019, 26–21–00–840–022, or 

Task 29–11–00–710–806) of Boeing 777–200/ 

300 Aircraft Maintenance Manual. 

(j) Credit for Previous Actions 

This paragraph provides credit for the 

actions specified in paragraphs (g)(1) and 

(i)(1) of this AD, if those actions were 

performed before the effective date of this AD 

using the service information specified in 

paragraph (j)(1), (2), or (3) of this AD. 

(1) Paragraph 2. of the Accomplishment 

Instructions of Pratt & Whitney Special 

Instruction No. 85F21, dated May 12, 2021, 

for a flow path UT inspection. 

(2) Paragraph 1.a) through c) of the 

Accomplishment Instructions of Pratt & 

Whitney Special Instruction No. 130F–21, 

dated July 1, 2021, for a flow path and a mid 

span UT inspection. 

(3) Paragraph 2.a) through c) of the 

Accomplishment Instructions of Pratt & 

Whitney Special Instruction No. 130F–21, 

Revision A, dated July 28, 2021, for a flow 

path and a mid span UT inspection. 

(k) Alternative Methods of Compliance 

(AMOCs) 

(1) The Manager, ECO Branch, FAA, has 

the authority to approve AMOCs for this AD, 

if requested using the procedures found in 14 

CFR 39.19. In accordance with 14 CFR 39.19, 

send your request to your principal inspector 

or local Flight Standards District Office, as 

appropriate. If sending information directly 

to the manager of the certification office, 

send it to the attention of the person 

identified in paragraph (l) of this AD. You 

may email your request to: ANE-AD-AMOC@

faa.gov. 

(2) Before using any approved AMOC, 

notify your appropriate principal inspector, 

or lacking a principal inspector, the manager 

of the local flight standards district office/ 

certificate holding district office. 

(l) Related Information 

For more information about this AD, 

contact Carol Nguyen, Aviation Safety 

Engineer, ECO Branch, FAA, 1200 District 

Avenue, Burlington, MA 01803; phone: (781) 

238–7655; fax: (781) 238–7199; email: 

carol.nguyen@faa.gov. 

(m) Material Incorporated by Reference 

(1) The Director of the Federal Register 

approved the incorporation by reference 

(IBR) of the service information listed in this 

paragraph under 5 U.S.C. 552(a) and 1 CFR 

part 51. 

(2) You must use this service information 

as applicable to do the actions required by 

this AD, unless the AD specifies otherwise. 

(i) Pratt & Whitney Alert Service Bulletin 

PW4G–112–A72–361, dated October 15, 

2021. 

(ii) [Reserved] 

(3) For service information identified in 

this AD, contact Pratt & Whitney Division, 

400 Main Street, East Hartford, CT 06118; 

phone: (860) 565–0140; email: help24@

prattwhitney.com; website: https://

connect.prattwhitney.com. 

(4) You may view this service information 

FAA, Airworthiness Products Section, 

Operational Safety Branch, 1200 District 

Avenue, Burlington, MA 01803. For 

information on the availability of this 

material at the FAA, call (817) 222–5110. 

(5) You may view this service information 

that is incorporated by reference at the 

National Archives and Records 

Administration (NARA). For information on 

the availability of this material at NARA, 

email: fr.inspection@nara.gov, or go to: 

https://www.archives.gov/federal-register/cfr/ 

ibr-locations.html. 

Issued on March 4, 2022. 

Lance T. Gant, 

Director, Compliance & Airworthiness 

Division, Aircraft Certification Service. 

[FR Doc. 2022–05296 Filed 3–9–22; 4:15 pm] 

BILLING CODE 4910–13–P 

DEPARTMENT OF TRANSPORTATION 

Federal Aviation Administration 

14 CFR Part 39 

[Docket No. FAA–2021–0963; Project 

Identifier AD–2021–01026–T; Amendment 

39–21977; AD 2022–06–11] 

RIN 2120–AA64 

Airworthiness Directives; The Boeing 

Company Airplanes 

AGENCY: Federal Aviation 

Administration (FAA), DOT. 

ACTION: Final rule. 

SUMMARY: The FAA is adopting a new 

airworthiness directive (AD) for certain 

The Boeing Company Model 777–200 


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