Service difficulty report · Threshold · Boeing 7377Q8

Difficulty date
June 3, 2022
Submitted
June 30, 2022
Operation
Air carrier
Aircraft
N7850B
Make and model
Boeing 7377Q8
Aircraft serial
28238
Aircraft time
59,194 hours, 39,098 cycles
Part
Threshold
Condition
Corroded
Location
Fwd Cargo
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 FWD CARGO BAY THRESHOLD AT RBL 28 BS 460+4. / [01] REMOVED CORROSION FROM FWD CARGO BAY THRESHOLD AT RBL 28; BS 460+4. IAW SRM 51-10-02-0G-0.;[02] REMOVED CORROSION DIMENSIONS: L = 3.3'; W = 1.1;[03] VERIFIED APPLICABILITY IAW SRM 53-30-15-1A-1 ALLOWABLE DAMAGE;[04] EVALUATED REWORKED AREA; ORIGINAL THICKNESS 0.045'; MAT. REMOVED: 0.012' REMAINING THICKNESS 0.033'; FOUND DAMAGE OUT OF LIMITS IAW SRM 53-30-15-1A-1 ALLOWABLE DAMAGE 1; FIG. 103; DETAIL D. TOOL DEPTH GAGE ID: ATS2677; S/N: UNKNOW; DUE: 11/2022.;[05] RECEIVED NEW THRESHOLD ITEM: 654A0003-58 LOT: 5099996-16. LOCATED AND DRILLED NEW THRESHOLD IAW SRM 51-40-05;[06] VERIFIED CORRECTIVE ACTION 5;[07] VERIFIED MEASUREMENT TABLE;[08] CERTIFY

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