Service difficulty report · Keelbeam · Boeing 7377H4

Difficulty date
May 12, 2025
Submitted
June 9, 2025
Operation
Air carrier
Aircraft
N942WN
Make and model
Boeing 7377H4
Aircraft serial
36648
Aircraft time
51,445 hours, 31,499 cycles
Part
Keelbeam
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

CRACK INTERNAL STRUCTURE KEEL BEAM LOCATED BETWEEN BS 727 TO BS 727A AND STR 27R AT AFT CARGO COMPARTMENT 2025-310172<[01] ON STEP 7 AND 8. TOOL USED: ET INSTRUMENT. P/N: NORTEC 600D. S/N: 60007161486. DUE DATE: 06-SEP-25.;[02] TOOLS USED: TEMPERATURE CONTROLLER: P/N: P3015GOES00000; S/N: 142811020; DUE DATE: 29-JAN-26; TEMPERATURE CONTROLLER P/N: 38615K71; S/N: AE-40585; DUE DATE: 26-JUL-25.;[03] TOOL USED: RADIOMETER PHOTOMETER; PN: XRP-3000; SN: 1753759; CAL DUE DATE: 30-JUN-25;[04] REPAIRED INTERNAL STRUCTURE KEEL BEAM LOCATED BETWEEN BS 727 TO BS 727A AND STR 27R AT AFT CARGO COMPARTMENT IAW EA 25-153-01234 SUMMARY AND EA 25-153-01234-WIP1 AND 25-153-01234-WIP2. SEE INDIVIDUAL SIGNOFFS BELOW.;[05] REPAIRED INTERNAL STRUCTURE KEEL BEAM LOCATED BETWEEN BS 727 TO BS 727A AND STR 27R AT AFT CARGO COMPARTMENT IAW EA 25-153-01234 SUMMARY AND EA 25-153-01234-WIP1 AND 25-153-01234-WIP2. RII. SEE INDIVIDUAL SIGNOFFS BELOW.

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