Service difficulty report · Strap · Boeing 73779P

Difficulty date
April 8, 2023
Submitted
May 1, 2023
Operation
Air carrier
Aircraft
N7858A
Make and model
Boeing 73779P
Aircraft serial
29361
Aircraft time
53,310 hours, 34,766 cycles
Part
Strap
Condition
Elongated
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 COMPARTMENT FLOOR AT STA 747; RBL 21; WL 156 FRAME HAS ELONGATED HOLE.<[01] REAMED UP ELONGATED HOLES ON DAMAGED FRAME AT STA. 747 PER REF. SRM 53-60-07-2R-2; FINAL HOLE DIAMETER ON UPPER HOLE 0.247' AND ON LOWER HOLE 0.247'; VENIER CALIPER USED B/C 174952; CAL DUE DATE. 15-JUL-23; FABRICATED REPAIR STRAP AND LOCATED NEW FASTENER HOLES IN REF B737-700 SRM 53-60-07-2R-2; LOCATED AND DILLED REPAIR PARTS IN REF B737-700 SRM 53-60-07-2R-2; INSTALLED HEX DRIVE BOLTS WET WITH BMS 5-95 P/N PS870B2-60Z SEALANT PER REF. SRM 53-60-07-2R-2; MIXED TIME 19:10 AND APPLIED TIME 19:12; 04/21/2023 AND INSTALLED FASTENERS ON REPAIR PART WITH BMS 5-95 P/N PS870B2-60Z SEALANT BETWEEN THE MATING SURFACES PER REF. SRM 53-60-07-2R-2.;[02] VERIFIED STEP # 1; VERIFIED REPEAT INSPECTION AT THRESHOLD.

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