47194 Federal Register / Vol. 75, No. 150 / Thursday, August 5, 2010 / Rules and Regulations 

(954) 359–3826; e-mail 

structure@embraer.com.br; at the applicable 

time specified in paragraph (f)(3)(i) or 

(f)(3)(ii) of this AD. The report must include 

the inspection results, a description of any 

discrepancies found, the airplane serial 

number, and the number of landings and 

flight hours on the airplane. 

(i) If the inspection was done on or after 

the effective date of this AD: Submit the 

report within 30 days after the inspection. 

(ii) If the inspection was accomplished 

prior to the effective date of this AD: Submit 

the report within 30 days after the effective 

date of this AD. 

FAA AD Differences 

Note 1: This AD differs from the MCAI 

and/or service information as follows: 

(1) Although Brazilian Airworthiness 

Directive 2008–10–02, effective October 21, 

2008, does not include a reporting 

requirement, the service bulletins identified 

in paragraph (f)(1) of this AD do specify 

reporting findings to EMBRAER. This AD 

requires that operators report the results of 

the inspections to EMBRAER because the 

required inspection report will help 

determine the extent of the corrosion in the 

affected fleet, from which we will determine 

if further corrective action is warranted. This 

difference has been coordinated with 

Ageˆncia Nacional de Aviac ̧a ̃o Civil (ANAC). 

(2) Brazilian Airworthiness Directive 2008– 

10–02, effective October 21, 2008, allows 

replacement of the affected APU mounting 

rods by ‘‘new ones bearing a new P/N [part 

number] approved by ANAC.’’ However, 

paragraph (f)(1)(ii) of this AD requires 

replacing the affected mounting rod only 

with a new mounting rod having the same 

part number. Operators may request approval 

of an alternative method of compliance in 

order to install a new part number in 

accordance with the procedures specified in 

paragraph (g)(1) of this AD. This difference 

has been coordinated with ANAC. 

Other FAA AD Provisions 

(g) The following provisions also apply to 

this AD: 

(1) Alternative Methods of Compliance 

(AMOCs): The Manager, International 

Branch, ANM–116, Transport Airplane 

Directorate, FAA, has the authority to 

approve AMOCs for this AD, if requested 

using the procedures found in 14 CFR 39.19. 

Send information to ATTN: Todd Thompson, 

Aerospace Engineer, International Branch, 

ANM–116, Transport Airplane Directorate, 

FAA, 1601 Lind Avenue SW., Renton, 

Washington 98057–3356; telephone (425) 

227–1175; fax (425) 227–1149. Before using 

any approved AMOC on any airplane to 

which the AMOC applies, notify your 

principal maintenance inspector (PMI) or 

principal avionics inspector (PAI), as 

appropriate, or lacking a principal inspector, 

your local Flight Standards District Office. 

The AMOC approval letter must specifically 

reference this AD. 

(2) Airworthy Product: For any requirement 

in this AD to obtain corrective actions from 

a manufacturer or other source, use these 

actions if they are FAA-approved. Corrective 

actions are considered FAA-approved if they 

are approved by the State of Design Authority 

(or their delegated agent). You are required 

to assure the product is airworthy before it 

is returned to service. 

(3) Reporting Requirements: For any 

reporting requirement in this AD, under the 

provisions of the Paperwork Reduction Act 

(44 U.S.C. 3501 et seq.), the Office of 

Management and Budget (OMB) has 

approved the information collection 

requirements and has assigned OMB Control 

Number 2120–0056. 

(4) Special Flight Permits: Special flight 

permits may be issued in accordance with 

sections 21.197 and 21.199 of the Federal 

Aviation Regulations (14 CFR 21.197 and 

21.199) to operate the airplane to a location 

where the airplane can be modified (if the 

operator elects to do so), except if two or 

more center mounting rods or rod ends are 

heavily corroded or broken, a special flight 

permit is not permitted. 

Related Information 

(h) Refer to MCAI Brazilian Airworthiness 

Directive 2008–10–02, effective October 21, 

2008; EMBRAER Service Bulletin 145–49– 

0034, Revision 01, dated September 8, 2008; 

and EMBRAER Service Bulletin 145LEG–49– 

0008, Revision 02, dated September 8, 2008; 

for related information. 

Material Incorporated by Reference 

(i) You must use EMBRAER Service 

Bulletin 145–49–0034, Revision 01, dated 

September 8, 2008; or EMBRAER Service 

Bulletin 145LEG–49–0008, Revision 02, 

dated September 8, 2008; as applicable; to do 

the actions required by this AD, unless the 

AD specifies otherwise. 

(1) The Director of the Federal Register 

approved the incorporation by reference of 

this service information under 5 U.S.C. 

552(a) and 1 CFR part 51. 

(2) For service information identified in 

this AD, contact Empresa Brasileira de 

Aeronautica S.A. (EMBRAER), Technical 

Publications Section (PC 060), Av. Brigadeiro 

Faria Lima, 2170–Putim–12227–901 Sa ̃o Jose 

dos Campos–SP–BRASIL; telephone: +55 12 

3927–5852 or +55 12 3309–0732; fax: +55 12 

3927–7546; e-mail: distrib@embraer.com.br; 

Internet: http://www.flyembraer.com. 

(3) You may review copies of the service 

information at the FAA, Transport Airplane 

Directorate, 1601 Lind Avenue, SW., Renton, 

Washington. For information on the 

availability of this material at the FAA, call 

425–227–1221. 

(4) You may also review copies of the 

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, call 202–741–6030, or go 

to: http://www.archives.gov/federal_register/ 

code_of_federal_regulations/ 

ibr_locations.html. 

Issued in Renton, Washington, on July 16, 

2010. 

Ali Bahrami, 

Manager, Transport Airplane Directorate, 

Aircraft Certification Service. 

[FR Doc. 2010–18398 Filed 8–4–10; 8:45 am] 

BILLING CODE 4910–13–P 

DEPARTMENT OF TRANSPORTATION 

Federal Aviation Administration 

14 CFR Part 39 

[Docket No. FAA–2010–0046; Directorate 

Identifier 2009–NM–086–AD; Amendment 

39–16383; AD 2010–16–06] 

RIN 2120–AA64 

Airworthiness Directives; The Boeing 

Company Model 737–300, –400, –500, 

–600, –700, and –800 Series Airplanes 

AGENCY: Federal Aviation 

Administration (FAA), DOT. 

ACTION: Final rule. 

SUMMARY: We are adopting a new 

airworthiness directive (AD) for certain 

Model 737–300, –400, –500, –600, –700, 

and –800 series airplanes. This AD 

requires inspecting to verify the part 

number of the low-pressure flex-hoses 

of the crew oxygen system installed 

under the oxygen mask stowage boxes 

located within the flight deck, and 

replacing the flex-hose with a new nonconductive low-pressure flex-hose if 

necessary. This AD results from reports 

of low-pressure flex-hoses of the crew 

oxygen system that burned through due 

to inadvertent electrical current from a 

short circuit in the audio select panel. 

We are issuing this AD to prevent 

inadvertent electrical current, which 

can cause the low-pressure flex-hoses of 

the crew oxygen system to melt or burn, 

causing oxygen system leakage and 

smoke or fire. 

DATES: This AD is effective September 9, 

2010. 

The Director of the Federal Register 

approved the incorporation by reference 

of certain publications listed in the AD 

as of September 9, 2010. 

ADDRESSES: For service information 

identified in this AD, contact Boeing 

Commercial Airplanes, Attention: Data 

& Services Management, P.O. Box 3707, 

MC 2H–65, Seattle, Washington 98124– 

2207; telephone 206–544–5000, 

extension 1; fax 206–766–5680; e-mail 

me.boecom@boeing.com; Internet 

https://www.myboeingfleet.com. 

Examining the AD Docket 

You may examine the AD docket on 

the Internet at http:// 

www.regulations.gov; or in person at the 

Docket Management Facility between 9 

a.m. and 5 p.m., Monday through 

Friday, except Federal holidays. The AD 

docket contains this AD, the regulatory 

evaluation, any comments received, and 

other information. The address for the 

Docket Office (telephone 800–647–5527) 

is the Document Management Facility, 


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Federal Register / Vol. 75, No. 150 / Thursday, August 5, 2010 / Rules and Regulations 47195 

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: 

Susan L. Monroe, Aerospace Engineer, 

Cabin Safety and Environmental 

Systems Branch, ANM–150S, FAA, 

Seattle Aircraft Certification Office, 

1601 Lind Avenue, SW., Renton, 

Washington 98057–3356; telephone 

(425) 917–6457; fax (425) 917–6590. 

SUPPLEMENTARY INFORMATION: 

Discussion 

We issued a notice of proposed 

rulemaking (NPRM) to amend 14 CFR 

part 39 to include an airworthiness 

directive (AD) that would apply to 

certain Model 737–300, –400, –500, 

–600, –700, and –800 series airplanes. 

That NPRM was published in the 

Federal Register on January 22, 2010 

(75 FR 3662). That NPRM proposed to 

require inspecting to verify the part 

number of the low-pressure flex-hoses 

of the crew oxygen system installed 

under the oxygen mask stowage boxes 

located within the flight deck, and 

replacing the flex-hose with a new nonconductive low-pressure flex-hose if 

necessary. 

Comments 

We gave the public the opportunity to 

participate in developing this AD. We 

considered the comments received. 

Support of NPRM 

Boeing concurs with the contents of 

the NPRM. 

Request for Clarification of Cup-Type 

Oxygen Mask Applicability 

All Nippon Airways requests that the 

FAA clarify the NPRM by including a 

note stating that the cup-type oxygen 

mask at the observer seat position is not 

included in the applicability statement 

of the NPRM, as stated in a note in the 

Accomplishment Instructions of Boeing 

Service Bulletin 737–35A1053, Revision 

1, dated June 1, 2000. 

We agree that clarification is 

necessary. Boeing Service Bulletin 737– 

35A1053, Revision 1, dated June 1, 

2000, provides information that 

describes the applicable parts and 

equipment. ADs do not identify parts 

and equipment that are not applicable; 

therefore, the cup-type oxygen mask is 

not included in the applicability 

statement. No change has been made to 

the AD in this regard. 

Request To Extend Compliance Time 

The Air Transport Association on 

behalf of its member American Airlines, 

requests that the 36-month compliance 

time be extended to 72 months to allow 

accomplishment during heavy 

maintenance. American Airlines states 

that this extended compliance time 

would be consistent with the apparent 

urgency being placed on this inspection 

by the FAA, which has waited over ten 

years since the original release of the 

service bulletin to issue the NPRM. 

American Airlines also states that the 

compliance urgency should also take 

into account that the proposed AD 

results from reports of hoses that burned 

through on a Model 757 airplane due to 

electrical current from a short circuit in 

the audio selector panel with no 

mention of reports of burned-through 

hoses on properly maintained Model 

737 airplanes. 

We do not agree. American Airlines 

provides no technical justification for 

extending the compliance time. In 

developing an appropriate compliance 

time, we considered the safety 

implications, parts availability, and 

normal maintenance schedules for 

timely accomplishment of the required 

actions. Further, we arrived at the 

compliance time with manufacturer 

concurrence. In consideration of all of 

these factors, we determined that the 

compliance time, as proposed, 

represents an appropriate interval in 

which the inspections can be done in a 

timely manner within the fleet, while 

still maintaining an adequate level of 

safety. If additional data are presented 

that would justify a longer compliance 

time, we may consider further 

rulemaking on this issue. No change has 

been made to the AD in this regard. 

Request for Clarification of Conductive 

Oxygen Hose Part Numbers 

The Air Transport Association on 

behalf of its member American Airlines, 

requests clarification regarding the 

conductive oxygen hose part numbers in 

Table 1 of the NPRM and the applicable 

airplane models. American Airlines 

states that the NPRM requires 

inspections for five conductive hose 

part numbers regardless of model 

applicability, and does not differentiate 

between part numbers that are 

applicable to Model 737–300, –400, and 

–500 series airplanes, and those 

applicable to Models 737–600, –700, 

and –800 series airplanes. American 

Airlines states that if an operator who 

flies only Model 737–800 series 

airplanes has accomplished Boeing 

Service Bulletin 737–35A1058, Revision 

1, dated June 1, 2000, for Model 737– 

800 airplanes prior to the effective date 

of the NPRM, the operator would now 

be required to perform another 

inspection to look for the part numbers 

in Boeing Service Bulletin 737– 

35A1053, Revision 1, dated June 1, 

2000, which does not apply to Model 

737–800 airplanes. American Airlines 

asserts that this places undue burden 

and expense on the operator. 

We agree that clarification is needed 

regarding the conductive hose part 

numbers. We have changed Table 1 of 

this final rule to identify part numbers 

for only Model 737–300, –400, and –500 

series airplanes. Table 2 has been added 

to this final rule to identify part 

numbers for Model 737–600, –700, and 

–800 series airplanes. 

Conclusion 

We reviewed the relevant data, 

considered the comments received, and 

determined that air safety and the 

public interest require adopting the AD 

with the changes described previously. 

We also determined that these changes 

will not increase the economic burden 

on any operator or increase the scope of 

the AD. 

Explanation of Change to Costs of 

Compliance 

Since issuance of the NPRM, we have 

increased the labor rate used in the 

Costs of Compliance from $80 per workhour to $85 per work-hour. The Costs of 

Compliance information, below, reflects 

this increase in the specified hourly 

labor rate. 

Costs of Compliance 

We estimate that this AD will affect 

851 airplanes of U.S. registry. We also 

estimate that it will take 1 work-hour 

per product to comply with this AD. 

The average labor rate is $85 per workhour. Based on these figures, we 

estimate the cost of this AD to the U.S. 

operators to be $72,335, or $85 per 

product. 

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. 

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 


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47196 Federal Register / Vol. 75, No. 150 / Thursday, August 5, 2010 / Rules and Regulations 

that is likely to exist or develop on 

products identified in this rulemaking 

action. 

Regulatory Findings 

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) Is not a ‘‘significant rule’’ under 

DOT Regulatory Policies and Procedures 

(44 FR 11034, February 26, 1979), 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. 

You can find our regulatory 

evaluation and the estimated costs of 

compliance in the AD Docket. 

List of Subjects in 14 CFR Part 39 

Air transportation, Aircraft, Aviation 

safety, Incorporation by reference, 

Safety. 

Adoption of 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 adding 

the following new AD: 

2010–16–06 The Boeing Company: 

Amendment 39–16383. Docket No. 

FAA–2010–0046; Directorate Identifier 

2009–NM–086–AD. 

Effective Date 

(a) This airworthiness directive (AD) is 

effective September 9, 2010. 

Affected ADs 

(b) None. 

Applicability 

(c) This AD applies to the airplanes 

identified in paragraphs (c)(1) and (c)(2) of 

this AD, certificated in any category. 

(1) The Boeing Company Model 737–300, 

–400, and –500 series airplanes, as identified 

in Boeing Service Bulletin 737–35A1053, 

Revision 1, dated June 1, 2000. 

(2) The Boeing Company Model 737–600, 

–700, and –800 series airplanes, as identified 

in Boeing Service Bulletin 737–35A1058, 

Revision 1, dated June 1, 2000. 

Subject 

(d) Air Transport Association (ATA) of 

America Code 35: Oxygen. 

Unsafe Condition 

(e) This AD results from reports of lowpressure flex-hoses of the crew oxygen 

system that burned through due to 

inadvertent electrical current from a short 

circuit in the audio select panel. The Federal 

Aviation Administration is issuing this AD to 

prevent inadvertent electrical current, which 

can cause the low-pressure flex-hoses of the 

crew oxygen system to melt or burn, resulting 

in oxygen system leakage and smoke or fire. 

Compliance 

(f) You are responsible for having the 

actions required by this AD performed within 

the compliance times specified, unless the 

actions have already been done. 

Inspection and Replacement 

(g) Within 36 months after the effective 

date of this AD, do an inspection to 

determine whether any low-pressure flexhose of the crew oxygen system installed 

under the oxygen mask stowage box in the 

flight deck has a part number identified in 

Table 1 or Table 2 of this AD, as applicable. 

A review of airplane maintenance records is 

acceptable in lieu of this inspection if the 

part number of the low-pressure flex-hoses of 

the crew oxygen system can be conclusively 

determined from that review. 

(1) For any hose having a part number 

identified in Table 1 or Table 2 of this AD, 

as applicable, before further flight, replace 

the hose with a new or serviceable part, in 

accordance with the Accomplishment 

Instructions of Boeing Service Bulletin 737– 

35A1053, Revision 1, dated June 1, 2000; or 

Boeing Service Bulletin 737–35A1058, 

Revision 1, dated June 1, 2000; as applicable. 

(2) For any hose not having a part number 

identified in Table 1 or Table 2 of this AD 

no further action is required by this 

paragraph. 

TABLE 1—APPLICABLE PART NUMBERS FOR MODEL 737–300, –400, AND –500 SERIES AIRPLANES

Boeing specification part No. 

Equivalent Boeing supplier part Nos. 

Puritan bennett Hydraflow 

10–60174–31 .......................................................................... 173470–31 .............................................................................. 37001–31 

10–60174–35 .......................................................................... 173470–35 .............................................................................. 37001–35 

10–60174–46 .......................................................................... Not Applicable ........................................................................ 37001–46 

60B50059–99 ......................................................................... Not Applicable ........................................................................ 38001–99 

TABLE 2—APPLICABLE PART NUMBERS FOR MODEL 737–600, –700, AND –800 SERIES AIRPLANES

Boeing specification part No. 

Equivalent Boeing supplier part Nos. 

Puritan bennett Hydraflow 

10–60174–31 .......................................................................... 173470–31 .............................................................................. 37001–31 

10–60174–35 .......................................................................... 173470–35 .............................................................................. 37001–35 

60B50059–124 ....................................................................... Not Applicable ........................................................................ 38001–124 

Parts Installation 

(h) As of the effective date of this AD, no 

person may install a crew oxygen hose with 

a part number identified in Table 1 or Table 

2 of this AD, as applicable, on any airplane. 

Actions Accomplished According to 

Previous Issue of Service Bulletins 

(i) Actions accomplished before the 

effective date of this AD in accordance with 

Boeing Alert Service Bulletin 737–35A1053, 

dated September 2, 1999; or Boeing Alert 

Service Bulletin 737–35A1058, dated 

September 2, 1999; as applicable; are 

considered acceptable for compliance with 

the corresponding actions specified in this 

AD. 

Alternative Methods of Compliance 

(AMOCs) 

(j)(1) The Manager, Seattle Aircraft 

Certification Office (ACO), FAA, has the 


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Federal Register / Vol. 75, No. 150 / Thursday, August 5, 2010 / Rules and Regulations 47197 

authority to approve AMOCs for this AD, if 

requested using the procedures found in 14 

CFR 39.19. Send information to Attn: Susan 

L. Monroe, Aerospace Engineer, Cabin Safety 

and Environmental Systems Branch, ANM– 

150S, FAA, Seattle Aircraft Certification 

Office, 1601 Lind Avenue SW., Renton, 

Washington 98057–3356; telephone (425) 

917–6457; fax (425) 917–6590. Or, e-mail 

information to 9–ANM–Seattle-ACO–AMOC– 

Requests@faa.gov. 

(2) To request a different method of 

compliance or a different compliance time 

for this AD, follow the procedures in 14 CFR 

39.19. Before using any approved AMOC on 

any airplane to which the AMOC applies, 

notify your principal maintenance inspector 

(PMI) or principal avionics inspector (PAI), 

as appropriate, or lacking a principal 

inspector, your local Flight Standards District 

Office. The AMOC approval letter must 

specifically reference this AD. 

Material Incorporated by Reference 

(k) You must use Boeing Service Bulletin 

737–35A1053, Revision 1, dated June 1, 

2000; or Boeing Service Bulletin 737– 

35A1058, Revision 1, dated June 1, 2000; as 

applicable; to do the actions required by this 

AD, unless the AD specifies otherwise. 

(1) The Director of the Federal Register 

approved the incorporation by reference of 

this service information under 5 U.S.C. 

552(a) and 1 CFR part 51. 

(2) For service information identified in 

this AD, contact Boeing Commercial 

Airplanes, Attention: Data & Services 

Management, P.O. Box 3707, MC 2H–65, 

Seattle, Washington 98124–2207; telephone 

206–544–5000, extension 1; fax 206–766– 

5680; e-mail me.boecom@boeing.com; 

Internet https://www.myboeingfleet.com. 

(3) You may review copies of the service 

information at the FAA, Transport Airplane 

Directorate, 1601 Lind Avenue, SW., Renton, 

Washington. For information on the 

availability of this material at the FAA, call 

425–227–1221. 

(4) You may also review copies of the 

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, call 202–741–6030, or go 

to: http://www.archives.gov/federal_register/ 

code_of_federal_regulations/ 

ibr_locations.html. 

Issued in Renton, Washington, on July 16, 

2010. 

Ali Bahrami, 

Manager, Transport Airplane Directorate, 

Aircraft Certification Service. 

[FR Doc. 2010–18624 Filed 8–4–10; 8:45 am] 

BILLING CODE 4910–13–P 

DEPARTMENT OF TRANSPORTATION 

Federal Aviation Administration 

14 CFR Part 39 

[Docket No. FAA–2010–0758; Directorate 

Identifier 2010–SW–004–AD; Amendment 

39–16385; AD 2010–16–08] 

RIN 2120–AA64 

Airworthiness Directives; Schweizer 

Aircraft Corporation (Schweizer) Model 

269D Helicopters 

AGENCY: Federal Aviation 

Administration (FAA), Department of 

Transportation (DOT). 

ACTION: Final rule; request for 

comments. 

SUMMARY: This amendment adopts a 

new airworthiness directive (AD) for the 

Schweizer Model 269D helicopters. This 

action requires installing a Scroll 

Housing Blade Containment Shielding 

Kit on each helicopter. This amendment 

is prompted by 21 reports of the blades 

of the oil cooler impeller separating, one 

of which punctured the engine and 

transmission oil cooler resulting in loss 

of engine oil pressure. The actions 

specified in this AD are intended to 

protect the oil cooler from uncontained 

oil cooler impeller blades that could 

damage the oil cooler and result in loss 

of engine and transmission oil pressure, 

and subsequent loss of control of the 

helicopter. 

DATES: Effective August 20, 2010. 

Comments for inclusion in the Rules 

Docket must be received on or before 

October 4, 2010. 

ADDRESSES: Use one of the following 

addresses to submit comments on this 

AD: 

• Federal eRulemaking Portal: Go to 

http://www.regulations.gov. Follow the 

instructions for submitting comments. 

• Fax: 202–493–2251. 

• Mail: U.S. Department of 

Transportation, Docket Operations, M– 

30, West Building Ground Floor, Room 

W12–140, 1200 New Jersey Avenue, SE., 

Washington, DC 20590. 

• Hand Delivery: U.S. Department of 

Transportation, Docket Operations, M– 

30, West Building Ground Floor, Room 

W12–140, 1200 New Jersey Avenue, SE., 

Washington, DC 20590, between 9 a.m. 

and 5 p.m., Monday through Friday, 

except Federal holidays. 

You may get the service information 

identified in this AD from Schweizer 

Aircraft Corporation, Elmira/Corning 

Regional Airport, 1250 Schweizer Road, 

Horseheads, NY 14845, telephone (607) 

739–3821, fax: (607) 796–2488, e-mail 

address schweizer@sacusa.com, or at 

http://www.sacusa.com/support. 

Examining the Docket: You may 

examine the docket that contains the 

AD, any comments, and other 

information on the Internet at http:// 

www.regulations.gov, or in person at the 

Docket Operations office between 9 a.m. 

and 5 p.m., Monday through Friday, 

except Federal holidays. The Docket 

Operations office (telephone (800) 647– 

5527) is located in Room W12–140 on 

the ground floor of the West Building at 

the street address stated in the 

ADDRESSES section. Comments will be 

available in the AD docket shortly after 

receipt. 

FOR FURTHER INFORMATION CONTACT: 

Richard P. Fiesel, Aviation Safety 

Engineer, FAA, New York Aircraft 

Certification Office, Airframe and 

Propulsion Branch, 1600 Stewart Ave., 

suite 410, Westbury, New York 11590, 

telephone (516) 228–7304, fax (516) 

794–5531. 

SUPPLEMENTARY INFORMATION: This 

amendment adopts a new AD for the 

Schweizer Model 269D helicopters. This 

action requires installing a certain Scroll 

Housing Blade Containment Shielding 

Kit on each helicopter. This amendment 

is prompted by 21 reports of the blades 

of the oil cooler impeller separating and 

damaging the oil cooler. One failure 

resulted in an emergency landing when 

the crew experienced vibration and loss 

of oil pressure. Further investigation 

revealed that a portion of a fan impeller 

blade damaged the oil cooler resulting 

in a loss of oil. This condition, if not 

corrected, could result in loss of engine 

and transmission oil pressure and 

subsequent loss of control of the 

helicopter. 

We have reviewed Schweizer Service 

Bulletin No. DB–031, dated September 

1, 2009 (SB), which specifies installing 

a Scroll Housing Blade Containment 

Shielding Kit, part number (P/N) SA– 

269DK–048 on each Model 269D 

helicopter. The manufacturer developed 

the containment kit after a recent 

incident in which separation of a blade 

due to fatigue cracks at the root of the 

blade resulted in damage to the oil 

cooler and loss of engine oil pressure. 

The SB states that the containment kit 

will prevent the escape of any separated 

impeller blades from the scroll assembly 

and relieve the operator of daily and 25- 

hour time-in-service (TIS) inspections. 

The SB also states that future 

inspections of the cooling impeller will 

be done at 100-hour TIS intervals per 

the maintenance manual. 

This unsafe condition is likely to exist 

or develop on other helicopters of the 

same type design. Therefore, this AD is 

being issued to prevent failure of the oil 

cooler, loss of engine and transmission 


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