Service difficulty report · Stiffener · Boeing 7377H4

Difficulty date
August 1, 2023
Submitted
August 4, 2023
Operation
Air carrier
Aircraft
N778SW
Make and model
Boeing 7377H4
Aircraft serial
27883
Aircraft time
73,431 hours, 43,659 cycles
Part
Stiffener
Part number
UNKNOWN
Condition
Corroded
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

IN FWD NOSE ACCESSORY COMPARTMENT; LEFT FWD NLG DOOR STOP INTERNAL STIFFENER CORRODED; (REF IPC 53-11-00-02; ITEM 445) CORROSION MEASURES APPROXIMATELY 1.20 INCHES IN WIDTH X 1.64 INCHES IN LENGTH.<[01] REMOVED INTERNAL STIFFENER (REF IPC 53-11-00-02; ITEM 445) AND FWD WHEEL WELL SEAL RETAINER TO ACCESS FASTENERS FOR STIFFENER PER SRM 51-40-02.;[02] C/W HFEC HOLE PROBE INSPECTION PER NDT MANUAL PART 6 51-00-00 PROCEDURE 16;[03] REPLACED LEFT FWD NLG DOOR STOP INTERNAL STIFFENER PN 141A7414-11 IAW 737 SRM 51-40-02 AND BOEING DRW 141A7410 ID13;[04] REPLACED LEFT FWD NLG DOOR STOP INTERNAL STIFFENER PN 141A7414-11 IAW 737 SRM 51-40-02 AND BOEING DRW 141A7410 ID13

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