Service difficulty report · Floor Panel · Boeing 7377H4

Difficulty date
May 3, 2022
Submitted
June 9, 2022
Operation
Air carrier
Aircraft
N477WN
Make and model
Boeing 7377H4
Aircraft serial
33988
Aircraft time
60,414 hours, 35,826 cycles
Part
Floor Panel
Part number
222BF
Condition
Delaminated
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

FLOOR PANEL 222BF UPPER SURFACE EDGE; AFT R/H 5' O/B FROM I/B ADJACENT TO INSERT IS DELAMED. / REMOVED DAMAGE FROM BOTH UPPER AND LOWER SURFACE FACE SHEETS; AND FULL DEPTH HONEYCOMB CORE; CLEANED IAW SRM 53-00-50-2R-6 PAR 3A;C-E.<BR><BR>CORRECTION FOR LINE ITEM 2 FABRICATED CORE PLUG OUT OF BMS 8-124 CL4 TY5 GR9 LOT#1287137; FABRICATED UPPER SURFACE REPAIR PLIES OUT OF BMS 9-3 ST 1581 LOT#1393735-8 IAW SRM 53-00-50-2R-6 PAR 3F-G(1). INSTALLED REPAIR PARTS USING BMS 8-201 TY IV LOT#1486957-3; AND BMS 5-28 TY 19 LOT#AK1IP5930K-1; VACUUM BAGGED; CHECKED FOR LEAKS USING PRESSURE GAGE ID:ATS2441 CALIBRATION DUE DATE:07/2022 IAW SRM 53-00-50-2R-6 PAR 3G(1);H(1). CURED REPAIR PARTS USING THERMOMETER ID:ATS2209 CALIBRATION DUE DATE:10/2022; UNBAGGED; SANDED CORE PLUG FLUSH WITH LOWER SURFACE FACE SHEET; AND FABRICATED LOWER SURFACE REPAIR PLIES USING BMS 9-3 ST 1581 LOT#1393735-8 IAW SRM 53-00-50-2R-6 PAR 3I(1)-K(1). INSTALLED LOWER SURFACE REPAIR PLIES USING BMS 8-201 TY IV LOT#1486957-3; VACUUM BAGGED; CHECKED FOR LEAKS USING PRESSURE GAGE ID:E11543 CALIBRATION DUE DATE:08/2022 IAW SRM 53-00-60-2R-6 PAR 3K(1);L(1). CURED LOWER SURFACE REPAIR PLIES UNDER HEAT LAMP USING THERMOMETER ID:ATS2209 CAL DUE:10/2022; AND REMOVED VACUUM BAG MATERIALS. IAW SRM 53-00-50-2R-6 PAR.3 M(1); WORK PERFORMED IAW SRM 53-00-50-2R-6 PARAGRAPH 3.N AND DRAWING 141A5810 SHEET 464.; ATTACHED CURE SHEETS TO FAULT AND VERIFIED COMPLETION OF REPAIRS TO UPPER SURFACE OF PANEL 222BF

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