Service difficulty report · Vapor Barrier · Boeing 7378H4

Difficulty date
June 8, 2020
Submitted
June 12, 2020
Operation
Air carrier
Aircraft
N8313F
Make and model
Boeing 7378H4
Aircraft serial
38810
Aircraft time
27,342 hours, 11,987 cycles
Part
Vapor Barrier
Condition
Cracked
Location
Fuselage
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

CENTER WING REAR SPAR VAPOR WEB CRACKED 8.0' AT RBL 31.83 FROM STIFFENER FOR FASTENER HEAD. REPETITIVE ACTION REQUIRED: REINSPECT PER SRM 57-10-10-1A-2: PERFORM VISUAL INSPECTION OF THE REPAIR AREA AT 1200 FLIGHT CYCLES INTERVALS. IF THE CRACK HAS GROWN PAST THE INTERIM SEAT REFER TO PARA 4. ALLOWABLE DAMAGE 2 FOR ALLOWABLE DAMAGE LIMITS. IF THE TOTAL LENGTH OF CRACK MUST ALLOWABLE LIMITS IN PARA 4. ALLOWABLE DAMAGE 2; REFER TO PARA 2C (4). ALLOWABLE DAMAGE 2 FOR REPAIR INSTRUCTIONS. IF DAMAGE EXCEEDS ALLOWABLE LIMITS DO A PERMANENT REPAIR PER 51-70-04; REPAIR 10 TO REMOVE TO CRACK. AS AN ALTERNATIVE YOU CAN REPAIR PART OF THE CRACK SO THAT THE CRACK LENGTH IS LESS THAN OR EQUAL TO MAX ALLOWABLE LIMITS. APPLY WITH INTERIM SEAL OVER THE CRACK THAT IS LEFT PER PARA 2C.(4). ALLOWABLE DAMAG 2.

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