Service difficulty report · Sill Drain · Boeing 73779P

Difficulty date
June 17, 2017
Submitted
January 26, 2022
Operation
Air carrier
Aircraft
N7858A
Make and model
Boeing 73779P
Aircraft serial
29361
Aircraft time
37,332 hours, 24,709 cycles
Part
Sill Drain
Condition
Corroded
Location
Aed Threshold
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*** CORROSION ON L/H AFT MOPSILL AT BS 975 / REMOVED CORROSION ON L/H AFT MOPSILL AT BS 975. IAW SRM 51-10-02-0G-0. AREA 2.5' X 3'. ORIGINAL MAT THICKNESS OF .080'. THE MAT REMAINING THICKNESS IS .059. FOUND TO BE OUT OF THE LIMITS. IAW SRM 53-70- 15-01-1. AND SRM 53-70-15-1A-A. REMOVED AND REPLACED MOPSILL ITEM #7530247 ON L/H AFT BETWEEN BS 887 TO BS 1016. IAW SRM 51-40-02-0G-0. 80002U 28JUN17 INTAL INTALLED MOPSILL IAW BOEING DWG 147A8501 88928U 28JUN17

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