Service difficulty report · Pressure Blkhd · Boeing 73776N

Difficulty date
December 30, 2022
Submitted
January 27, 2023
Operation
Air carrier
Aircraft
N7812G
Make and model
Boeing 73776N
Aircraft serial
32582
Aircraft time
56,870 hours, 33,864 cycles
Part
Pressure Blkhd
Condition
Corroded
Location
Bs 693 Lbl35
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 PASSENGER CABIN PRESSURE WEB AT LBL 35 BS 693.<[01] REMOVED CORROSION ON PASSENGER CABIN PRESSURE WEB AT LBL 35 BS 693 IN AN AREA OF 0.8X0.85 IAW SRM 51-10-02-0G-0;[02] REMOVED 1EA FASTENER AT B.S 693 LBL 35 IAW SRM 51-40-02-0G-0;[03] VERIFIED CORRECTIVE ACTIONS STEP 1;2.;[04] COMPLETED STEPS 1; 2 AND 3.;[05] INSTALLED 1EA FASTENER AT B.S 693 LBL 35 IAW SRM 51-40-02-0G-0;[06] VERIFIED CORRECTIVE ACTION #5;[07] PASSENGER CABIN PRESSURE WEB AT LBL 35; BS 693 HAS NO ALLOWABLE DAMAGE ENTRY THEREFORE; DAMAGE IS FOUND TO BE OUT OF LIMITS PER SRM 51-10-02-0G-0.;[08] VERIFIED CORRECTIVE ACTIONS STEP 7.;[09] REPAIRED DAMAGE ON PASSENGER CABIN PRESSURE WEB AT LBL 35; BS 693 PER EA 23-153-00067.;[10] VERIFIED REPAIRED DAMAGE ON PASSENGER CABIN PRESSURE WEB AT LBL 35; BS 693 PER EA 23-153-00067 AND MEASUREMENT FIELD.;[11] VERIFIED REPAIRED DAMAGE ON PASSENGER CABIN PRESSURE WEB AT LBL 35; BS 693 PER EA 23-153-00067 AND MEASUREMENT FIELD.

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