Service difficulty report · Clamp · Boeing 7377H4

Difficulty date
March 22, 2026
Submitted
March 26, 2026
Operation
Air carrier
Aircraft
N924WN
Make and model
Boeing 7377H4
Aircraft serial
36628
Aircraft time
57,106 hours, 34,695 cycles
Part
Clamp
Condition
Loose
Location
Duct
Stage of operation
CL
How discovered
O
Nature of condition
B
Precautionary procedure
O

As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.

What was found

LEFT WING BODY OVERHEAT LIGHT ILLUMINATED PASSING FL260 ON CLIMBOUT<[01] INSPECTED FOR LEAKS; NONE FOUND. OK TO CONTINUE PER MEL 26-12-01 SP1 AUTH# 311416.;[02] TROUBLESHOT AND FOUND WIGGINS CLAMP FROM NGS HEAT EXCHANGER MISSING. FOUND ASM INSULATION BURNED AND MISSING FROM ASM. SUSPECT OPEN DUCT BURNED INSULATION FROM ASM AND CAUSED WING TO BODY OVERHEAT TO OCCUR;[03] REMOVED AND REPLACED WIGGINS CLAMP ON NGS HEAT EXCHANGER AND NGS ASM REF AMM 47-11-01. OPS CHECKS GOOD NO LEAKS NOTED

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