Service difficulty report · Support Angle · Boeing 73779P

Difficulty date
July 28, 2021
Submitted
August 20, 2021
Operation
Air carrier
Aircraft
N7860A
Make and model
Boeing 73779P
Aircraft serial
29362
Aircraft time
44,729 hours, 31,068 cycles
Part
Support Angle
Condition
Cracked
Location
Bs 500d-520
Stage of operation
IN
How discovered
V
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

DURING CIC APPLICATION FOUND 1 ANGLE SUPPORT CRACKED AT FWD CARGO COMP.R/H SIDE BETW. STA 500D THRU 520 ; / [01] REMOVED ANGLE SUPPORT AT FWD CARGO R/H SIDE BETWEEN STA 500D-STA 520 STR-25R AS REF. B737-700 SRM 51-40-02-0G-0; [02] FABRICATED INTERCOSTAL AT FWD CARGO R/H SIDE BETWEEN STA 500D THRU STA 520 AS PER DRAWING 143A9803; [03] VERIFIED STEP 1 AND 2; [04] ACCOMPLISHED ALUMINUM HEAT TREATMENT AT INTERCOSTAL FABRICATED FROM 7075-O 0.32 TO T6. AS PER REF B737-700 BAC 5602; [05] APPLIED TOP COAT AT SKIN CLOSEOUT PANEL AS PER REF B737-700 AMM 51-21-73-370-803; [06] VERIFIED TOP COAT APPLICATION; [07] CORRECTION. APPLIED TREAT AND PRIMER INTERCOSTAL AS PER AMM 51-21-72-370-804; [08] VERIFIED CORRECTION TOP COAT WRITTEN IN ERROR. VERIFIED APPLICATION OF TREAT AND PRIMER.; [09] CERTIFIED ANGLE SUPPORT REMOVAL; [10] CERTIFIED; [11] VERIFIED JOB ACCOMPLISHED IN STEP 4; [12] OK TO INSTALL NEW INTERCOSTAL; [13] INSTALLED NEW(FABRICATED) INTERCOSTAL AT FWD CARGO R/H SIDE BETWEEN STA 500D AND STA 520 AS REFERENCE B737-700 SRM 51-40-02-0G-0 AND BOEING DRAWING #143A7902; [14] VERIFIED INSTALLATION

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