Service difficulty report · Frame · Boeing 737

Difficulty date
November 12, 2021
Submitted
April 27, 2022
Operation
Air carrier
Aircraft
N770SA
Make and model
Boeing 737
Aircraft serial
30589
Aircraft time
69,290 hours, 41,022 cycles
Part
Frame
Condition
Cracked
Location
Fuselage
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

SUPPLEMENTAL INFORMATION: ABOVE L1 CUTOUT LWR END OF FRAME BS 312 APPEARS TO BE CRACKED AT RADIUS BETWEEN S-5L AND S-6L. 8-95 ; / [01] REMOVED EXISTING FASTENERS FOR ACCESS TO REPAIR IN IAW SRM 51-40-02-0G-0; [19] INSTALLED REPAIR ANGLE AT L-1 CUTOUT LWR OF FRAME BS 312 BETWEEN S-5L AND S-6L IN IAW SRM 53-10-07-2R-1 FIG 202 AND 203 SHEET 1; [20] APPLIED A LAYER OF BMS 3-23; TYPE LL CORROSION INHIBITING COMPOUND ON THE SURFACE OF REPAIR AREA IN IAW AMM 51-21-91-620-801; [21] FABRICATED AND INSTALLED REPAIR ANGLE AT L-1 CUTOUT LWR OF FRAME BS 312 BETWEEN S-5L AND S-6L IN IAW SRM 53-10-07-2R-1 FIG 202 AND 203 SHEET 1; [22] VERIFIED STEPS 18;19;20 AND 21.