14 CFR Part 39 [4910-13-P]

DEPARTMENT OF TRANSPORTATION Federal Aviation Administration 

# O~Lf" [Docket No. FAA-20IO-++++; Directorate Identifier 2009-NM-223-AD] RlN 2120-AA64 AilWorthiness Directives; The Boeing Company Model 727, 727C, 727-100, 727-100C 727-200, and 727-200F Series Airplanes AGENCY: Federal Aviation Administration (FAA), DOT. ACTION: Notice ofproposed rulemaking (NPRM). SlJMl\IlARY: We propose to adopt anew airworthiness directive (AD) for all Model 727, 727C, 727-100, 727-100C, 727-200, and 727-200F series airplanes. This proposed AD would require repetitive detailed inspections ofthe aftpressure bulkhead web for cracking, and repair ifnecessary. For certain airplanes, this proposed AD also would 

## - 101 INITIM.S-'SIG

IlOl.lTING$\'''lll)L provide for an optional preventative modification ofthe aftpressure bulkhead web, whic would terminate certain repetitive detailed inspections. This proposed AD results from reports ofcracks inthe aft pressure bulkhead web. We are proposing this AD to detect and correct cracking inthe aftpressure hUlkbea~ web, which could adversely affect the structural integrity ofthe airplane, resulting indifficulty maintaining cabin pressurizatio or rapid decompression ofthe airplane. DATES: We must receive comments on this proposed AD by [INSERT DATE 45 DAYS AFTER DATE OF PUBLICATION INTHE FEDERAL REGISTER]. INlTlAl,$'S'" I'AU RO'!TI~G"·MHO'.

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lSGSV"IlOL(4910-13-P)

DEPARTMENT OF TRANSPORTATION Federal Aviation Administration -O"CVRRE'KES RO,,",'lNG SYMBQL 14CFR Part 39 (Docket No. FAA-2010-++++; Directorate Idel'tifier 2009-NM-223-AD) RIN 2120-AA64 [NmALSI$IG

DUnNG SYMBOL OUTING SYMBOL AGENCY: Federal Aviation Administration (FAA), DOT. 

# I ACTION: Notice ofproposed rulemaking (NPR.1\1). ROVTTNG'5YM60L 

# I f\\H-,- 

## \U,5 SUMMARY: We propose t.oadopt anew airwOrhiness directive (AD) for all Model 'lAL;'S!; 727, 727C, 727-100, 727-10nC, 727-200, and 727-200F series airplanes. This proposed DATE ," "-"\ 

# I b 10 10 AD would require repetitive detailed inspections ofthe aftpressure bulkhead web for outin~5.{mbo' k· d .. [ F . 

# II h· dAD 1 Id 

## 5fA-fiEb crac mg, an repau 1 necessary. or certam alri anes, t IS propose a sowou l"mAlS/SIG provide for an optional preventative modification ofthe aft pressure bulkhead web, whic 

## "I would terminate certain repetitive detailed inspeftions. This proposed AD results fTom reports ofcracks inthe aftpressure bulkhead we~. We are proposing this AD to detect and correct cracking inthe aft pressure bulkhea1 web, which could adversely affect the structural integrity ofthe aiJplane. resulting indift,iculty maintaining cabin pressurizatio &-<:1-10 Ainvorthiness Directivesj The Boeing CornpaI!YModel 727, 727C, 727-100, 727_100CRollm,e,;SYM50l 

### f\DfI~-IZOS 727-200, and 727-200F Series Airplanes INlTIAlSISIG

orrapid decompression ofthe airplane. DATES: We must receive comments on this proposed AD by [INSERT DATE 45 

# I DAYS AFTER DATE OFPUBLICATION IN THE FEDERAL REGISTER]. RDUTI"G Syr-tBOl 'N[nAl.SISIG 

## b,,".-~--[4910-13-P]

DEPARTMENT OF TRANSPORT AT10N Federal Aviation Administration 14CFR Part 39 (Docket No. FAA-10lO-++++; Directorate Identifier 2009-NM-223-AD] RlN 2120-AA64

AGENCY: Federal Aviation Administration (FAA), DOT. ACTION: Notice ofproposed rulemaking (NPRM). oonNG'SYMBOl

OVTIGSYMBOIAD would require repetitive detailed inspections ofthe aft pressure bulkhead web for cracking, and repair ifnecessary. For certain airplanes, this proposed AD also would i\\20 t-'\..•\7..(E, SUMMARY: We propose to adopt anew airworthiness directive (AD) for all Model INJ'l"LSlS1G 

# 'l i ~ 727, 727C, 727-100, 727-J()OC, 727-200, and 727-200F series airplanes. This proposed';";' ... .~

would terminate certain repetitive detailed inspections. This proposed AD results from provide for an optional preventative modification ofthe aftpressure bulkhead web, whic reports ofcracks in the aftpressure bulkhead web. We arc proposing this AD to detect and correct cracking inthe aftpressure bulkhead web, which could adversely affect the 

### ft0(n-iDU NmA~SISIG

ATC structural integrity ofthe airplane, resulting indifficulty maintaining cabin pressurizatio OuTlNO SYMllO~ or rapid decompression ofthe airplane. DATES: We must receive comments on this proposed AD by [INSERT DATE 45 DAYS AFTER DATE OF PUBLICATION IN THE FEDERAL REGISTER].

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