Service difficulty report · Rail · Boeing 7377H4

Difficulty date
March 10, 2023
Submitted
April 18, 2023
Operation
Air carrier
Aircraft
N281WN
Make and model
Boeing 7377H4
Aircraft serial
36528
Aircraft time
51,516 hours, 31,045 cycles
Part
Rail
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

AFT CARGO BAY - RAIL HAS CORROSION BS 767+5 LBL 7.75; LBL 12; RBL 3.<[01] VERIFIED APLICABILITY SRM 53-60-53-0I-2 FOR IDENTIFICATION AND SRM 53-00-53-1A-2 FOR ALLOWABLE DAMAGE;[02] COMPLETED STEPS 1-3.<BR><BR>OK TO APPLY CHEMICAL CONVERSION COATING AND PRIMER.;[03] VERIFIED CORRECTIVE ACTIONS 1;2 AND STEPS 1-3. VERIFIED MEASUREMENT TABLE.;[04] APPLIED CHEMICAL CONVERSION COATING AND PRIMER PER SRM#53-00-53-1A-2 STEPS 2.E.(1)-(2);[05] VERIFIED CORRECTIVE ACTION ITEM 4. MEASUREMENT FIELD REMAINING THICKNESS STATES 0.060'; NOT CORRECT PER SUB-STEPS 1 AND 2; HAS 0.059' AS REMAINING THICKNESS.;[06] UPDATED MEASUREMENT TABLE TO REFLECT 0.059';[07] SEE CORRECTIVE ACTION 6: UPDATED MEASUREMENT TABLE TO REFLECT 0.059';[08] VERIFIED CORRECTIVE ACTION ITEMS AND MEASUREMENT FIELDS; CARD COMPLETE.

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