Service difficulty report · Slat · Boeing 7377Q8

Difficulty date
March 16, 2023
Submitted
April 4, 2023
Operation
Air carrier
Aircraft
N7819A
Make and model
Boeing 7377Q8
Aircraft serial
30649
Aircraft time
65,235 hours, 39,673 cycles
Part
Slat
Condition
Cracked
Location
Zn 500 Left Wing
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

SLAT #2 LEADING EDGE SLAT NOSE SKIN AT ACTUATOR RIB - UPON INSPECTION OF CUTOUT; FOUND TWO THROUGH FASTENERS AT THE TERMINAL FITTING TO BE CRACKED. MARKED LOCATIONS.<REMOVED #2 SLAT PER AMM 27-81-21-000-801. INSTALLED MAIN TRACKS ON #2 SLAT ASSY; VERIFIED FIT OF DOWN STOP ASSEMBLY BOLT IN MAIN SLAT TRACK IAW AMM 27-81-21-400-802 STEP 5.G(5) AND AMM 27-81-21-400-801 STEPS 3.H(3.C#2 SLAT INSTALLED; IB AND OB DOWN STOP ASSEMBLY BOLT TORQUED AND SAFETIED AUXILIARY ARMS ATTACHED TO #2 SLATCLOSED PANELS 521PB 521SB IAW AMM 57-41-02-400-801 AND #2 SLAT ACT DOOR PANEL IAW AMM 20-50-11-910-801<BR><BR>TOOL ID: ATS1310 DUE: 10/2023;[25] VERIFIED CORRECTIVE ACTIONS STEP 24.;[26] RAISED FAULT TTG8Q00K58B7 FOR ORIGINAL DISCREPANCY AGAINST OFF UNIT SLAT MPN 114A5020-3 S/N 001055;[27] VERIFIED SKIN TAB GAPS ARE GOOD; PRELOAD IS GOOD AND L/E FLAP AND SLAT OPERATIONAL TEST IS GOOD IAW MM 27-81-00-820-803 STEPS 4.I.(3-5).;[28] VERIFIED CORRECTIVE ACTIONS 26 AND 27

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