Service difficulty report · Strap · Boeing 75724APF

Difficulty date
April 1, 2025
Submitted
April 24, 2025
Operation
Air carrier
Aircraft
N470UP
Make and model
Boeing 75724APF
Aircraft serial
25486
Aircraft time
34,739 hours, 20,775 cycles
Part
Strap
Part number
148N313820
Condition
Corroded
Location
Zone 200
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

APU DOOR SURROUND FS1825.00 FROM FS 3R TO FS 6R THE 148N3138-8000 IS CORRODED.REMOVED RIVETS AND NUTPLATE FOR ACCESS FROM FS 1825 UPPER FUSELAGE APU DOOR SURROUND STRAP P/N 148N3138-8000.IAW B757-200, SRM 51-40-02 AND SRM 53-80-15-2R-1.FABRICATED, LOCATED AND DRILLED NEW FILLER (1EA) P/N 7075-T6 0.100 BACH #4333488 NEW STRAP (2 EA) P/N 7075-T6 0.125 BACH #2706804 PER B757 SRM 53-80-15-2R-1 SRM 51-40-05.TREAT AND PRIME APPLIED AT NEW STRAPS AND NEW FILLERS (STEP 8-STEP 15) IAW B757-200, SRM 51-20-01 P/N ALODINE1132, BATCH 0004262137.P/N PRIMER 02-013-8, BATCH 0004331967.P/N CUP 2F-CA3.INSTALLED NEW FILLER (1EA) P/N 7075-T6 0.100, STRAP (2 EA) P/N 7075-T6 0.125, STRAP (1EA) P/N 7075-T6. 0.100. IAW B757-200, SRM 53-80-15-2R-1 AND SRM 51-40-02.

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