Service difficulty report · Web · Boeing 73779P

Difficulty date
August 22, 2023
Submitted
September 21, 2023
Operation
Air carrier
Aircraft
N7826B
Make and model
Boeing 73779P
Aircraft serial
30035
Aircraft time
56,002 hours, 37,056 cycles
Part
Web
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

CORROSION ON FORWARD CARGO BAY DOOR CUT-OUT SUB-THRESHOLD WEB FROM STA 440+11 TO 460+10; RBL 28 TO 30; WL 156.<[01] VERIFIED APLICABILITY SRM 53-30-53-0I-2 FOR IDENTIFICATION<BR>AND SRM 53-00-53-1A-2 FOR ALLOWABLE DAMAGE;[02] VERIFIED PARTIAL UPDATES FOR STEPS 3 AND 4.;[03] VERIFIED MEASUREMENT TABLE.;[04] VERIFIED STEP 5.;[05] REMOVED AND REPLACE ON FORWARD CARGO BAY DOOR CUT-OUT SUB-THRESHOLD WEB BETWEEN BS 440 - BS.492.4 RBL 28. WL 156 IAW SRM 51-10-02 PARG.9. C.;[06] REJECTED: SEVERAL BLIND RIVETS STEM NEGATIVE PROTRUSION EXCEEDS '-0.020 INCH' LIMITS PER SRM 51-40-02 FIG 9. GENERATED TTG8Q00N6K4E;[07] TASK COMPLETE

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