Service difficulty report · Attach Angle · Boeing 7378H4

Difficulty date
July 22, 2025
Submitted
August 22, 2025
Operation
Air carrier
Aircraft
N8699A
Make and model
Boeing 7378H4
Aircraft serial
36923
Aircraft time
29,624 hours, 14,712 cycles
Part
Attach Angle
Condition
Cracked
Location
Zone 100
Stage of operation
IN
How discovered
V
Nature of condition
O
Precautionary procedure
K

As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.

What was found

BS 663 VAPOR BARRIER ATTACH ANGLE CRACKED ON INBOARD SIDE OF FLEX JOINT @ RBL 9 AND SUSPECTED CRACK AT RBL 34<[01] ACCOMPLISHED HFEC SURFACE INSPECTION OF RBL 34' VERIFIED AREA IS CRACKED. PER NDT PART 6 51-00-00 PROC. 23;[02] REMOVED RIVETS @ R/H 663 ATTACH ANGLE COMMON TO THE BULKHEAD PER SRM 51-40-02.;[03] REMOVED VERTICALLY INSTALLED HI LOKS COMMON TO STA 663 VAPOR BARRIER ANGLE BETWEEN RBL 9 AND RBL 34.;[04] REMOVED CRACKED L ANGLE R/H A/C BAY AFT WALL STA 663.;[05] MATCH DRILLED NEW R/H L ANGLE @ 663 PER SRM 51-30-01.;[06] VERIFIED MATCH DRILLED NEW R/H L ANGLE @ 663 PER SRM 51-30-01 IN STEP 5.;[07] REJECT: CORRECTIVE ACTION #3 AND #4 MISSING THE WORK REFERENCE AS REQUIRED PER MPM 51.3.1.<BR><BR>REJECT: CORRECTIVE ACTION #3 AND #4 REQUIRE INSPECTION BUYBACK PER MPM CHAPTER 10.;[08] REMOVED VERTICALLY INSTALLED HI LOKS COMMON TO STA 663 VAPOR BARRIER ANGLE BETWEEN RBL 9 AND RBL 34. PER SRM 51-40-02;[19] REPLACED R/H BS 663 VAPOR BARRIER ATTACH ANGLE PER SRM 51-40-02 & DWG 111A1000.;

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