Service difficulty report · Pressure Deck · Boeing 7377H4

Difficulty date
August 8, 2023
Submitted
August 24, 2023
Operation
Air carrier
Aircraft
N420WN
Make and model
Boeing 7377H4
Aircraft serial
29825
Aircraft time
72,005 hours, 42,658 cycles
Part
Pressure Deck
Part number
UNKNOWN
Condition
Cracked
Location
Zn 100 Fus Lower
Stage of operation
IN
How discovered
9
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

CRACKS NOTED ON HORIZONTAL PRESSURE DECK WEB AT BS665 LBL32.5 0.5'L; AND AT BS664 LBL30.5 0.3'L. MARKED<[01] VERIFIED APPLICABILITY OF SRM 53-40-51-2R-2;[02] UPDATED STEPS 1-6;[03] UPDATED STEPS 7-9.;[04] UPDATED STEP 10.;[05] UPDATED STEPS 12; 13 & 14.;[06] STEPS 5; 6; 7; 8; 9 AND 13 COMPLETED.;[07] PARTIAL STEP 6;[08] COMPLETED STEP 13.;[09] VERIFIED CORRECTIVE ACTION COMPLETE STEPS 5;6;7;8 & 9.;[10] STEPS 1-4; IN PARTIAL.;[11] STEP 13 COMPLETE.;[12] INSTALLED ALL REPAIR PARTS (1EA) DOUBLER; (7 EA.); (1EA) WEB REPLACEMENT AND (6 EA.) FILLER STIFFENERS; AT HORIZONTAL PRESSURE DECK FROM BS 663 TO BS 674; LBL 27 TO LBL 62; WL 202PER SRM 53-40-51-2R-2; REPAIR 2 AND BOEING DWG. 144A7700; ID: 109.;[13] VERIFIED STEPS 1;2;3;4; COMPLETE.;[14] VERIFIED STEP 13 COMPLETE AND ALL STEPS AND MEASUREMENT TABLE COMPLETE; CARD COMPLETE;[15] CERTIFIED STEP 11

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