Service difficulty report · Angle · Boeing 7378H4

Difficulty date
July 9, 2023
Submitted
August 4, 2023
Operation
Air carrier
Aircraft
N8544Z
Make and model
Boeing 7378H4
Aircraft serial
36926
Aircraft time
19,891 hours, 9,804 cycles
Part
Angle
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

REJECT: AFT CARGO R/H TRANSITION ANGLE; CORROSION IS STILL PRESENT ON UNDERSIDE OF NUTPLATES STA. 847 TO STA 867 RBL 22.<[01] REMOVED AFT CARGO SHIELD PLATED PER SRM 51-40-05.<BR><BR>LOCATED; DRILLED; AND COUNTERSUNK NEW AFT CARGO DOOR SHIELD PLATE IAW SRM 51-40-05 AND SRM 51-40-08. TREATED AND PRIMED NEW HOLES IAW SRM 51-20-01.;[02] REMOVED CORROSION AFT CARGO TRANSITION ANGLE R/H TRANSITION ANGLE STA 847 - 867 ON THE UNDERSIDE OF NUTPLATES. ORIGINAL THICKNESS IS 0.050?; MATERIAL LOSS IS 0.013?; MAX ALLOWED IS 0.005?; REMAINING THICKNESS IS 0.037?. FOUND TO BE OUT OF LIMITS PER SRM 53-00-53-1A-2;[03] INSTALLED NEW R/H SHIELD (TRANSITION ANGLE) BETWEEN STA 847 - 867 PER SRM 51-40-02;[04] VERIFIED NEW R/H SHIELD (TRANSITION ANGLE) BETWEEN STA 847 - 867 INSTALLED.

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