Service difficulty report · Intercostal · Boeing 7378H4

Difficulty date
June 13, 2023
Submitted
July 17, 2023
Operation
Air carrier
Aircraft
N8542Z
Make and model
Boeing 7378H4
Aircraft serial
63581
Aircraft time
19,473 hours, 9,653 cycles
Part
Intercostal
Part number
UNKNOWN
Condition
Corroded
Location
Zn 100 Fus Lower
Stage of operation
IN
How discovered
9
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

CORROSION AFT CABIN WET AREA FLOOR SUPPORT INTERCOSTAL FASTENER'S HOLE @ RBL 27 STA 951 WL 208.1 MKD DOT<[01] REMOVED CORROSION; PERFORMED HFEC ROTOR INSPECTION; VERIFIED HFEC ROTOR INSPECTION; TREATED AND PRIMED REWORKED FASTENER HOLE; PERFORMED UT THICKNESS INSPECTION; VERIFIED UT THICKNESS INSPECTION AREA FOUND OUT OF LIMITS; REMOVED AFT CABIN WET ARE FLOOR SUPPORT INTERCOSTAL; AND INSTALLED NEW AFT CABIN WET AREA FLOOR SUPPORT INTERCOSTAL. PER SRM 51-10-02-0G-0; PER SRM 53-70-51-1A-1; PER AMM 51-21-41-370-803 AND 51-21-72-370-802; PER SRM 53-70-51-1A-1; PER SRM 51-40-02-0G-0; PER SRM 51-40-02-0G-0.;[02] VERIFIED AND INSPECTED REMOVED CORROSION AFT CABIN WET AREA FLOOR SUPPORT INTERCOSTAL FASTENER'S HOLE @ RBL 27 STA 951 WL 208.1

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