Service difficulty report · Frame · Boeing 7379

Difficulty date
July 13, 2026
Submitted
July 15, 2026
Operation
Air carrier
Aircraft
N37521
Make and model
Boeing 7379
Aircraft serial
64497
Aircraft time
18,129 hours, 6,039 cycles
Part
Frame
Part number
143A61185
Condition
Cracked
Location
Zone 100
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

FWD CARGO DOOR, UPPER FORMED FRAME WITH CRACK ON UPPER CHORD AT BS 477. PERFORMED THE REPAIR TO THE UPPER FRAME IAW ECRA 5230-02326, .THE REPAIR ACCOMPLISHED IN PART 1 IS A CATEGORY B REPAIR REQUIRING REPETITIVE INSPECTION REQUIRMENTS (RIR) STATED IN PART 2. PERFORMED THE REPAIR TO THE UPPER FRAME P/N 143A6115-5 IAW ECRA 5230-02326. THE REPAIR ACCOMPLISHED IN PART 1 IS A CATEGORY B REPAIR REQUIRING REPETITIVE INSPECTION REQUIRMENTS (RIR) STATED IN PART 2. REF: DIP L/P FOR INSPECTION IS 9581704 AND DIP L/P TO CONTACT ENGINNEERING IS L/P 9581866 ESFR# 3940 HAS BEEN CREATED. ALL FUTURE WORK TO BE PERFORMED PER THE LATEST REVISION OF ECRA 5230-02326 AS STATED BY DIP L/P 9581704 & PLANNING DIP L/P 9581866. ESFR# 3940 NOTED BY MAINTENANCE, ALL FUTURE WORK TO BE PERFORMED PER THE LATEST REVISION OF ECRA 5230-02326 AS STATED BY DIP L/P 9581704 & PLANNING DIP L/P 9581866.

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