Service difficulty report · Skin · Boeing 75724APF

Difficulty date
September 4, 2026
Submitted
November 5, 2026
Operation
Air carrier
Aircraft
N463UP
Make and model
Boeing 75724APF
Aircraft serial
28267
Aircraft time
40,351 hours, 21,499 cycles
Part
Skin
Part number
148N3770
Condition
Delaminated
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

LOWER BILGE COMPOSITE SKIN PANEL BETWEEN STA 1963 TO 1992 FWD AND AFT EDGES DISBONDED WITH AREAS OF CORROSION INCLUDING FWD EDGE LEVELING COMPOUND DETERIORATED AND NOT SECURED. RL028. REPAIRED IAW: B757-200PF SRM 51-70-10-2R-4 REPAIR 4, PARA. 3, FIG. 201 (SHT 1), 202 (SHT 3), AND 204 (SHT 1).B757-200PF SRM 51-70-10-2R-0 REPAIR GENERAL AL SKIN/HONEYCOMB PANEL REPAIRS, PARA. 6 - 11 (BMS5-162 TYPE 1, PERM), 14 - 15 (TABLE 206, BMS5-137 TYPE 1, CLASS 3, 260 DEG F CURE 60 - 120 MIN.), 17 - 18, AND 20 - 22 (TABLE 208, BMS5-127 TYPE II, CLASS 1, 300 DEG F CURE, 6 HR), FIG. 201.

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