Federal Register / Vol. 74, No. 130 / Thursday, July 9, 2009 / Rules and Regulations 32799 

DEPARTMENT OF TRANSPORTATION 

Federal Aviation Administration 

14 CFR Parts 23, 25, 27, 29, 91, 121, 

125 and 135 

[Docket No. FAA–2005–20245; Amendment 

No. 23–58, 25–124, 27–43, 29–50, 91–300, 

121–338, 125–54, 129–45, and 135–113] 

RIN 2120–AH88 

Revisions to Cockpit Voice Recorder 

and Digital Flight Data Recorder 

Regulations 

AGENCY: Federal Aviation 

Administration, DOT. 

ACTION: Final rule; correction. 

SUMMARY: The Federal Aviation 

Administration (FAA) is amending a 

final rule published in the Federal 

Register on March 7, 2008. That final 

rule amended cockpit voice recorder 

and digital flight data recorder 

regulations affecting certain air carriers, 

operators, and aircraft. In that final rule, 

the FAA failed to include conforming 

amendments to certain operating rules 

to ensure that certain new requirements 

apply to only newly manufactured 

aircraft. 

DATES: Effective Date: These 

amendments become effective July 9, 

2009. 

FOR FURTHER INFORMATION CONTACT: For 

technical questions contact: Timothy W. 

Shaver, Avionics Systems Branch, 

Aircraft Certification Service, AIR–130, 

Federal Aviation Administration, 800 

Independence Avenue, SW., 

Washington, DC 20591; telephone (202) 

385–4686; facsimile (202) 385–4651; 

e-mail tim.shaver@faa.gov. For legal 

questions contact: Karen L. Petronis, 

Regulations Division, Office of the Chief 

Counsel, Federal Aviation 

Administration, 800 Independence 

Avenue, SW., Washington, DC 20591; 

telephone (202) 267–3073; facsimile 

(202) 267–3073; e-mail 

karen.petronis@faa.gov. 

SUPPLEMENTARY INFORMATION: The 

Federal Aviation Administration (FAA) 

published a final rule entitled 

‘‘Revisions to Cockpit Voice Recorder 

and Digital Flight Data Recorder 

Regulations’’ in the Federal Register on 

March 7, 2008 (73 FR 12542). That final 

rule amended cockpit voice recorder 

(CVR) and digital flight data recorder 

(DFDR) regulations affecting certain air 

carriers, operators, and aircraft 

manufacturers by: 

• Increasing the duration of certain 

CVR recordings, 

• Increasing the data recording rate 

for certain DFDR parameters, 

• Requiring physical separation of the 

DFDR and CVR, improving the 

reliability of the power supplies to both 

the CVR and DFDR, and 

• Requiring that certain datalink 

communications received on an aircraft 

be recorded if datalink communication 

equipment is installed. 

Following publication of the final 

rule, an individual contacted us noting 

that §§ 91.609(e)(1) and 135.151(a)(1) 

require a CVR to be installed in 

accordance with § 23.1457(d) or 

§ 25.1457(d). He noted that when we 

added new requirements to 

§§ 23.1457(d) and 25.1457(d) in the final 

rule without changing §§ 91.609(e)(1) 

and 135.151(a)(1), we mandated an 

immediate retrofit of existing aircraft to 

comply with the new certification 

requirements. He stated that this result 

appeared to conflict with our stated 

intent in the preamble to the final rule 

indicating that these new provisions 

would apply only to newly 

manufactured aircraft. 

We agree that our failure to amend 

certain operating rules not otherwise 

addressed in the final rule had this 

unintended effect. We took the 

opportunity to review all of the 

operating rules in Title 14 Code of 

Federal Regulations (14 CFR) to 

determine whether other sections were 

similarly affected. Our review found 

similar issues in §§ 121.344, 121.344a, 

121.359, 125.226 and 135.152. 

We received another comment 

suggesting that we forgot to include the 

recorder location and mounting 

requirement for CVRs in airplanes 

operated under part 125. This is a 

requirement for newly manufactured 

airplanes. We agree that this was an 

oversight, and are amending 

§ 125.227(h)(1) to correct this error. 

This document makes the appropriate 

amendatory changes to clearly reflect 

the impact that the final rule’s new 

requirements have on §§ 91.609, 

121.344, 121.344a, 121.359, 125.226, 

125.227, 135.151 and 135.152. This 

amendment will not impose any 

additional restrictions on operators 

affected by these regulations. 

This document also corrects the 

change made to § 129.1(b), which 

included certain sections that had been 

redesignated. 

Correcting Amendment 

This correcting amendment will 

clarify the references to §§ 23.1457, 

23.1459, 25.1457, 25.1459, 27.1457, 

27.1459, 29.1457 and 29.1459 in 

§§ 91.609, 121.344, 121.344a, 121.359, 

125.226, 129.1, 135.151 and 135.152. 

This amendment also modifies 

references to §§ 23.1457, 25.1457, 

27.1457, and 29.1457, by separating the 

two requirements in paragraph (d)(1) of 

each section into two subparagraphs. 

The first requirement will be designated 

(d)(1)(i); the second will be designated 

(d)(1)(ii). The second requirement, 

which was added in the final rule, 

applies only to airplanes manufactured 

after April 7, 2010. References to these 

sections contained in the operating rules 

are also being amended to conform to 

this modification. 

Similarly, this amendment modifies 

references to §§ 23.1459, 25.1459, 

27.1459, and 29.1459 by separating the 

two requirements in paragraph (a)(3) of 

these sections into two subparagraphs. 

The first requirement will be designated 

paragraph (a)(3)(i); the second will be 

designated (a)(3)(ii). The second 

requirement, which was added in the 

final rule, applies only to airplanes 

manufactured after April 7, 2010. 

References to these sections contained 

in the operating rules are also being 

amended to conform to this 

modification. 

This amendment will revise 

§ 125.227(h)(1) to reference § 25.1457(e). 

Finally, this amendment corrects the 

list of sections included in § 129.1(b). 

List of Subjects 

14 CFR Parts 23, 25, 27, 29, 91 and 125 

Aircraft, Aviation safety. 

14 CFR Part 121 

Air carriers, Aircraft, Aviation safety, 

Charter flights, Safety, Transportation. 

14 CFR Part 129 

Air carriers, Aircraft, Aviation safety. 

14 CFR Part 135 

Air taxis, Aircraft, Aviation safety. 

Correction 

■ In consideration of the foregoing, the 

Federal Aviation Administration 

amends parts 23, 25, 27, 29, 91, 121, 

125, 129, and 135 of Title 14, Code of 

Regulations, as follows: 

PART 23—AIRWORTHINESS 

STANDARDS: NORMAL, UTILITY, 

ACROBATIC, AND COMMUTER 

CATEGORY AIRPLANES 

■ 1. The authority citation for part 23 

continues to read as follows: 

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

44702, 44704. 

■ 2. Amend § 23.1457 by revising 

paragraph (d)(1) to read as follows: 

§ 23.1457 Cockpit voice recorders. 

* * * * * 

(d) * * * 


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(1)(i) It receives its electrical power 

from the bus that provides the 

maximum reliability for operation of the 

cockpit voice recorder without 

jeopardizing service to essential or 

emergency loads. 

(ii) It remains powered for as long as 

possible without jeopardizing 

emergency operation of the airplane. 

* * * * * 

■ 3. Amend § 23.1459 by revising 

paragraph (a)(3) to read as follows: 

§ 23.1459 Flight data recorders. 

(a) * * * 

(3)(i) It receives its electrical power 

from the bus that provides the 

maximum reliability for operation of the 

flight data recorder without jeopardizing 

service to essential or emergency loads. 

(ii) It remains powered for as long as 

possible without jeopardizing 

emergency operation of the airplane. 

* * * * * 

PART 25—AIRWORTHINESS 

STANDARDS: TRANSPORT 

CATEGORY AIRPLANES 

■ 4. The authority citation for part 25 

continues to read as follows: 

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

44702, and 44704. 

■ 5. Amend § 25.1457 by revising 

paragraph (d)(1) to read as follows: 

§ 25.1457 Cockpit voice recorders. 

* * * * * 

(d) * * * 

(1)(i) It receives its electrical power 

from the bus that provides the 

maximum reliability for operation of the 

cockpit voice recorder without 

jeopardizing service to essential or 

emergency loads. 

(ii) It remains powered for as long as 

possible without jeopardizing 

emergency operation of the airplane. 

* * * * * 

■ 6. Amend § 25.1459 by revising 

paragraph (a)(3) to read as follows: 

§ 25.1459 Flight data recorders. 

(a) * * * 

(3)(i) It receives its electrical power 

from the bus that provides the 

maximum reliability for operation of the 

flight data recorder without jeopardizing 

service to essential or emergency loads. 

(ii) It remains powered for as long as 

possible without jeopardizing 

emergency operation of the airplane. 

* * * * * 

PART 27—AIRWORTHINESS 

STANDARDS: NORMAL CATEGORY 

ROTORCRAFT 

■ 7. The authority citation for part 27 

continues to read as follows: 

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

44702, 44704. 

■ 8. Amend § 27.1457 by revising 

paragraph (d)(1) to read as follows: 

§ 27.1457 Cockpit voice recorders. 

* * * * * 

(d) * * * 

(1)(i) It receives its electrical power 

from the bus that provides the 

maximum reliability for operation of the 

cockpit voice recorder without 

jeopardizing service to essential or 

emergency loads. 

(ii) It remains powered for as long as 

possible without jeopardizing 

emergency operation of the airplane. 

* * * * * 

■ 9. Amend § 27.1459 by revising 

paragraph (a)(3) to read as follows: 

§ 27.1459 Flight data recorders. 

(a) * * * 

(3)(i) It receives its electrical power 

from the bus that provides the 

maximum reliability for operation of the 

flight data recorder without jeopardizing 

service to essential or emergency loads. 

(ii) It remains powered for as long as 

possible without jeopardizing 

emergency operation of the airplane. 

* * * * * 

PART 29—AIRWORTHINESS 

STANDARDS: TRANSPORT 

CATEGORY ROTORCRAFT 

■ 10. The authority citation for part 29 

continues to read as follows: 

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

44702, 44704. 

■ 11. Amend § 29.1457 by revising 

paragraph (d)(1) to read as follows: 

§ 29.1457 Cockpit voice recorders. 

* * * * * 

(d) * * * 

(1)(i) It receives its electrical power 

from the bus that provides the 

maximum reliability for operation of the 

cockpit voice recorder without 

jeopardizing service to essential or 

emergency loads. 

(ii) It remains powered for as long as 

possible without jeopardizing 

emergency operation of the airplane. 

* * * * * 

■ 12. Amend § 29.1459 by revising 

paragraph (a)(3) to read as follows: 

§ 29.1459 Flight data recorders. 

(a) * * * 

(3)(i) It receives its electrical power 

from the bus that provides the 

maximum reliability for operation of the 

flight data recorder without jeopardizing 

service to essential or emergency loads. 

(ii) It remains powered for as long as 

possible without jeopardizing 

emergency operation of the airplane. 

* * * * * 

PART 91—GENERAL OPERATING AND 

FLIGHT RULES 

■ 13. The authority citation for part 91 

continues to read as follows: 

Authority: 49 U.S.C. 106(g), 1155, 40103, 

40113, 40120, 44101, 44111, 44701, 44709, 

44711, 44712, 44715, 44716, 44717, 44722, 

46306, 46315, 46316, 46504, 46506–46507, 

47122, 47508, 47528–47531, articles 12 and 

29 of the Convention on International Civil 

Aviation (61 stat. 1180). 

■ 14. Amend § 91.609 by revising 

paragraph (e)(1) to read as follows: 

§ 91.609 Flight data recorders and cockpit 

voice recorders. 

* * * * * 

(e) * * * 

(1) Is installed in compliance with 

§ 23.1457(a)(1) and (2), (b), (c), (d)(1)(i), 

(2) and (3), (e), (f), and (g); 

§ 25.1457(a)(1) and (2), (b), (c), (d)(1)(i), 

(2) and (3), (e), (f), and (g); 

§ 27.1457(a)(1) and (2), (b), (c), (d)(1)(i), 

(2) and (3), (e), (f), and (g); or 

§ 29.1457(a)(1) and (2), (b), (c), (d)(1)(i), 

(2) and (3), (e), (f), and (g) of this 

chapter, as applicable; and 

* * * * * 

PART 121—OPERATING 

REQUIREMENTS: DOMESTIC, FLAG, 

AND SUPPLEMENTAL OPERATIONS 

■ 15. The authority citation for part 121 

continues to read as follows: 

Authority: 49 U.S.C. 106(g), 40113, 40119, 

41706, 44101, 44701–44702, 44705, 44709– 

44711, 44713, 44716–44717, 44722, 46105. 

■ 16. Amend § 121.344 by revising 

paragraph (j) introductory text to read as 

follows: 

§ 121.344 Digital flight data recorders for 

transport category airplanes. 

* * * * * 

(j) Each flight data recorder system 

required by this section must be 

installed in accordance with the 

requirements of § 25.1459(a) (except 

paragraphs (a)(3)(ii) and (a)(7)), (b), (d) 

and (e) of this chapter. A correlation 

must be established between the values 

recorded by the flight data recorder and 

the corresponding values being 

measured. The correlation must contain 

a sufficient number of correlation points 

to accurately establish the conversion 


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Federal Register / Vol. 74, No. 130 / Thursday, July 9, 2009 / Rules and Regulations 32801 

from the recorded values to engineering 

units or discrete state over the full 

operating range of the parameter. Except 

for airplanes having separate altitude 

and airspeed sensors that are an integral 

part of the flight data recorder system, 

a single correlation may be established 

for any group of airplanes— 

* * * * * 

■ 17. Amend § 121.344a by revising 

paragraph (d) introductory text to read 

as follows: 

§ 121.344a Digital flight data recorders for 

10–19 seat airplanes. 

* * * * * 

(d) Each flight data recorder system 

required by this section must be 

installed in accordance with the 

requirements of § 23.1459(a) (except 

paragraphs (a)(3)(ii) and (6)), (b), (d) and 

(e) of this chapter. A correlation must be 

established between the values recorded 

by the flight data recorder and the 

corresponding values being measured. 

The correlation must contain a 

sufficient number of correlation points 

to accurately establish the conversion 

from the recorded values to engineering 

units or discrete state over the full 

operating range of the parameter. A 

single correlation may be established for 

any group of airplanes— 

* * * * * 

■ 18. Amend § 121.359 by revising 

paragraphs (d)(1) and (e)(1) to read as 

follows: 

§ 121.359 Cockpit voice recorders. 

* * * * * 

(d) * * * 

(1) Is installed in compliance with 

§ 23.1457(a)(1) and (2), (b), (c), (d)(1)(i), 

(2) and (3), (e), (f), and (g); or 

§ 25.1457(a)(1) and (2), (b), (c), (d)(1)(i), 

(2) and (3), (e), (f), and (g) of this 

chapter, as applicable; and 

* * * * * 

(e) * * * 

(1) Is installed in compliance with 

§ 23.1457 (except paragraphs (d)(1)(ii), 

(4) and (5)) or § 25.1457 (except 

paragraphs (d)(1)(ii), (4) and (5)) of this 

chapter, as applicable; and 

* * * * * 

PART 125—CERTIFICATION AND 

OPERATIONS: AIRPLANES HAVING A 

SEATING CAPACITY OF 20 OR MORE 

PASSENGERS OR A MAXIMUM 

PAYLOAD CAPACITY OF 6,000 

POUNDS OR MORE; AND RULES 

GOVERNING PERSONS ON BOARD 

SUCH AIRCRAFT 

■ 19. The authority citation for part 125 

continues to read as follows: 

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

44702, 44705, 44710–44711, 44713, 44716– 

44717, 44722. 

■ 20. Amend § 125.226 by revising 

paragraph (j) introductory text to read as 

follows: 

§ 125.226 Digital flight data recorders. 

* * * * * 

(j) Each flight data recorder system 

required by this section must be 

installed in accordance with the 

requirements of § 25.1459(a) (except 

paragraphs (a)(3)(ii) and (7)), (b), (d) and 

(e) of this chapter. A correlation must be 

established between the values recorded 

by the flight data recorder and the 

corresponding values being measured. 

The correlation must contain a 

sufficient number of correlation points 

to accurately establish the conversion 

from the recorded values to engineering 

units or discrete state over the full 

operating range of the parameter. Except 

for airplanes having separate altitude 

and airspeed sensors that are an integral 

part of the flight data recorder system, 

a single correlation may be established 

for any group of airplanes— 

* * * * * 

■ 21. Amend 125.227 by revising 

paragraph (h)(1) to read as follows: 

§ 125.227 Cockpit voice recorders. 

* * * * * 

(h) * * * 

(1) Meets the requirements of 

§ 25.1457(a)(3) through (a)(6), (d)(1), 

(d)(4), (d)(5), (d)(6), and (e) of this 

chapter; 

* * * * * 

PART 129—OPERATIONS: FOREIGN 

AIR CARRIERS AND FOREIGN 

OPERATORS OF U.S.-REGISTERED 

AIRCRAFT ENGAGED IN COMMON 

CARRIAGE 

■ 22. The authority citation for part 129 

continues to read as follows: 

Authority: 49 U.S.C. 1372, 40113, 40119, 

44101, 44701–44702, 44705, 44709–44711, 

44713, 44716–44717, 44722, 44901–44904, 

44906, 44912, 46105, Pub. L. 107–71, sec. 

104. 

■ 23. Amend § 129.1 by revising 

paragraph (b) to read as follows: 

§ 129.1 Applicability. 

* * * * * 

(b) Operations of U.S.-registered 

aircraft solely outside the United States. 

In addition to the operations specified 

under paragraph (a) of this section, 

§§ 129.14, 129.20 and 129.24 and 

subpart B also apply to U.S.-registered 

aircraft operated solely outside the 

United States in common carriage by a 

foreign person or foreign air carrier. 

* * * * * 

PART 135—OPERATING 

REQUIREMENTS: COMMUTER AND 

ON DEMAND OPERATIONS AND 

RULES GOVERNING PERSONS ON 

BOARD SUCH AIRCRAFT 

■ 24. The authority citation for part 135 

continues to read as follows: 

Authority: 49 U.S.C. 106(g), 41706, 44113, 

44701–44702, 44705, 44709, 44711–44713, 

44715–44717, 44722. 

■ 25. Amend § 135.151 by revising 

paragraphs (a)(1) and (b)(1) to read as 

follows: 

§ 135.151 Cockpit voice recorders. 

* * * * * 

(a) * * * 

(1) Is installed in compliance with 

§ 23.1457(a)(1) and (2), (b), (c), (d)(1)(i), 

(2) and (3), (e), (f), and (g); 

§ 25.1457(a)(1) and (2), (b), (c), (d)(1)(i), 

(2) and (3), (e), (f), and (g), 

§ 27.1457(a)(1) and (2), (b), (c), (d)(1)(i), 

(2) and (3), (e), (f), and (g); or 

§ 29.1457(a)(1) and (2), (b), (c), (d)(1)(i), 

(2) and (3), (e), (f), and (g) of this 

chapter, as applicable; and 

* * * * * 

(b) * * * 

(1) Is installed in compliance with 

§ 23.1457 (except paragraphs (d)(1)(ii), 

(4) and (5)), § 25.1457 (except 

paragraphs (d)(1)(ii), (4) and (5)), 

§ 27.1457 (except paragraphs (d)(1)(ii), 

(4) and (5)) or § 29.1457 (except 

paragraphs (d)(1)(ii), (4) and (5)) of this 

chapter, as applicable; and 

* * * * * 

■ 26. Amend § 135.152 by revising 

paragraphs (f)(1) introductory text and 

(f)(2) introductory text to read as 

follows: 

§ 135.152 Flight data recorders. 

* * * * * 

(f)(1) For airplanes manufactured on 

or before August 18, 2000, and all other 

aircraft, each flight recorder required by 

this section must be installed in 

accordance with the requirements of 

§ 23.1459 (except paragraphs (a)(3)(ii) 

and (6)), § 25.1459 (except paragraphs 

(a)(3)(ii) and (7)), § 27.1459 (except 

paragraphs (a)(3)(ii) and (6)), or 

§ 29.1459 (except paragraphs (a)(3)(ii) 

and (6)), as appropriate, of this chapter. 

The correlation required by paragraph 

(c) of §§ 23.1459, 25.1459, 27.1459, or 

29.1459 of this chapter, as appropriate, 

need be established only on one aircraft 

of a group of aircraft: 

* * * * * 


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(2) For airplanes manufactured after 

August 18, 2000, each flight data 

recorder system required by this section 

must be installed in accordance with the 

requirements of § 23.1459(a) (except 

paragraphs (a)(3)(ii) and (6)), (b), (d) and 

(e), or § 25.1459(a) (except paragraphs 

(a)(3)(ii) and (7)), (b), (d) and (e) of this 

chapter. A correlation must be 

established between the values recorded 

by the flight data recorder and the 

corresponding values being measured. 

The correlation must contain a 

sufficient number of correlation points 

to accurately establish the conversion 

from the recorded values to engineering 

units or discrete state over the full 

operating range of the parameter. Except 

for airplanes having separate altitude 

and airspeed sensors that are an integral 

part of the flight data recorder system, 

a single correlation may be established 

for any group of airplanes— 

* * * * * 

Issued in Washington, DC, on July 2, 2009. 

Pamela Hamilton-Powell, 

Director, Office of Rulemaking. 

[FR Doc. E9–16056 Filed 7–8–09; 8:45 am] 

BILLING CODE 4910–13–P 

DEPARTMENT OF TRANSPORTATION 

Federal Aviation Administration 

14 CFR Part 39 

[Docket No. FAA–2009–0046; Directorate 

Identifier 2008–NE–05–AD; Amendment 39– 

15962; AD 2009–14–12] 

RIN 2120–AA64 

Airworthiness Directives; Pratt & 

Whitney Canada Corp. (P&WC) Models 

PW305A and PW305B Turbofan 

Engines 

AGENCY: Federal Aviation 

Administration (FAA), DOT. 

ACTION: Final rule. 

SUMMARY: We are adopting a new 

airworthiness directive (AD) for the 

products listed above. This AD results 

from mandatory continuing 

airworthiness information (MCAI) 

issued by an aviation authority of 

another country to identify and correct 

an unsafe condition on an aviation 

product. The MCAI describes the unsafe 

condition as: 

P&WC has determined that the PostService Bulletin (SB) PW300–72–24287 High 

Pressure Compressor (HPC) drum rotor 

assemblies P/N 30B2478 and 30B2542 on PW 

305A and 305B engines with single stage 

coated labyrinth seals, are susceptible to 

developing significant cracks in the region of 

the labyrinth seal. 

We are issuing this AD to detect cracks 

in the HPC drum rotor assembly, which 

could lead to an uncontained failure of 

the drum rotor assembly and damage to 

the airplane. 

DATES: This AD becomes effective 

August 13, 2009. 

ADDRESSES: The Docket Operations 

office is located at Docket Management 

Facility, U.S. Department of 

Transportation, 1200 New Jersey 

Avenue, SE., West Building Ground 

Floor, Room W12–140, Washington, DC 

20590–0001. 

FOR FURTHER INFORMATION CONTACT: Ian 

Dargin, Aerospace Engineer, Engine 

Certification Office, FAA, Engine & 

Propeller Directorate, 12 New England 

Executive Park, Burlington, MA 01803; 

e-mail: ian.dargin@faa.gov; telephone 

(781) 238–7178; fax (781) 238–7199. 

SUPPLEMENTARY INFORMATION: 

Discussion 

We issued a notice of proposed 

rulemaking (NPRM) to amend 14 CFR 

part 39 to include an AD that would 

apply to the specified products. That 

NPRM was published in the Federal 

Register on February 20, 2009 (74 FR 

7836). That NPRM proposed to correct 

an unsafe condition for the specified 

products. The MCAI states: 

P&WC has determined that the PostService Bulletin (SB) PW300–72–24287 High 

Pressure Compressor (HPC) drum rotor 

assemblies P/N 30B2478 and 30B2542 on PW 

305A and 305B engines with single stage 

coated labyrinth seals, are susceptible to 

developing significant cracks in the region of 

the labyrinth seal. 

P&WC issued SB PW300–72–24462 for 

initial inspection of affected HPC drum rotor 

assemblies for cracks. In addition, the PW305 

Maintenance Manual (MM) 05–20–00 was 

revised (Revision No. 26) accordingly, to add 

requirement for repeat inspection interval. A 

new P/N 31B6325–01, HPC drum rotor 

assembly, which is not susceptible to subject 

cracking, is made available through SB 

PW300–72–24376, as terminating action for 

the required repeat inspection. 

Recent data (Ref: SIL: PW300–093) indicate 

that a number of high-time Pre-SB–PW300– 

72–24376 HPC drum rotor assemblies (P/N 

30B2478 and 30B2542), with potential for a 

hazardous disk failure in consequence of 

non-compliance with the inspection 

requirements, are still in-service. This AD is 

issued to mandate the inspection of the 

affected P/N 30B2478 and 30B2542 HPC 

drum rotor assemblies in accordance with 

PW305–MM–05–20–00 requirements. 

Comments 

We gave the public the opportunity to 

participate in developing this AD. We 

received no comments on the NPRM or 

on the determination of the cost to the 

public. 

Conclusion 

We reviewed the available data and 

determined that air safety and the 

public interest require adopting the AD 

as proposed. 

Costs of Compliance 

Based on the service information, we 

estimate that this AD will affect about 

540 products of U.S. registry. We also 

estimate that it will take about 10 workhours per product to comply with this 

AD. The average labor rate is $80 per 

work-hour. Required parts will cost 

about $5,000 per product. Based on 

these figures, we estimate the cost of the 

AD on U.S. operators to be $3,132,000. 

Our cost estimate is exclusive of 

possible warranty coverage. 

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 

that is likely to exist or develop on 

products identified in this rulemaking 

action. 

Regulatory Findings 

We 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 this 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. 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. 


rmajette on DSK29S0YB1 with RULES