Service difficulty report · Floor Panel · Boeing 7377K9

Difficulty date
August 27, 2022
Submitted
September 20, 2022
Operation
Air carrier
Aircraft
N7878A
Make and model
Boeing 7377K9
Aircraft serial
34320
Aircraft time
52,141 hours, 25,914 cycles
Part
Floor Panel
Part number
221GF
Condition
Broken
Location
Cabin Floor
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

FWD FLOOR PANEL 221GF FWD O/B CORNER TANG IS BROKEN. / DAMAGE IS OUT OF ALLOWABLE DAMAGE LIMITS ACCORDING TO SRM 53-00-50-1A-1; PARA. 4.E.(1) REMOVED 6EA THRU INSERTS; AND 1EA BLIND INSERT REMOVED DELAMINATED SKIN PLIES AND CORE AT THE FWD O/B CORNER; REMOVED SURFACE CONTAMINANTS; PREPARED REPAIR AREA APPLICATION OF REPAIR PLIES APPLIED POTTING TO BLIND INSERT LOCATION IN PREPARATION FOR REPAIR PLIES USING BMS 5-28TY19 LOT#AK2DP3091K; CURED WITH THERMOMETER ID:ATS2208 CAL DUE 10/2022 IAW SRM 53-00-50-2R-1 PARA 3.G.;[05] ADDITION TO CORRECTIVE ACTION 4: IAW SRM 53-00-50-2R-1 PARA 3.G;H.;[06] SANDED POTTING COMPOUND FLUSH WITH THE SURROUNDING AREAS ACCORDING TO SRM 53-00-50-2R-1; PARA. 3.I.<BR><BR>FABRICATED UPPER SKIN REPAIR PLIES FROM BMS 9-3; ST 1581 FIBERGLASS (LOT# 1493221-1); FABRICATED REPLACEMENT CORE SECTION FROM BMS 8-124; TY 5; GR 9 HONEYCOMB CORE (LOT# 1287137); APPLIED REPAIR PLIES USING BMS 8-201; TY 3 RESIN (LOT# AK2EP8210K); INSTALLED THE REPLACEMENT CORE SECTION USING BMS 5-28; TY 19 POTTING COMPOUND (LOT# AK2DP3091K); VACUUM BAGGED AREA FOR HEAT BLANKET CURE; ] INSTALLED LOWER SKIN REPAIR PLIES USING BMS 8-201TY3 LOT#AK2EP8210K; VACUUM BAGGED;)INSTALLED 6EA THRU INSERTS USING BMS 5-107; CL 1 ADHESIVE (LOT# AK1KP9159K); AND 1EA. BLIND INSERT USING BMS 5-28; TY 19 COMPOUND (LOT# AK2DP3091K); ALL ACCORDING TO SRM 53-00-50-2R-6 PARA 3.N.; AND DWG# 141A5810; SHEET 181. REPAIR IS COMPLETE.<BR><BR>THERMOMETER ID: ATS2208; DUE: 10/2022;

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