Service difficulty report · Rail · Boeing 7377H4

Difficulty date
March 31, 2022
Submitted
May 2, 2022
Operation
Air carrier
Aircraft
N475WN
Make and model
Boeing 7377H4
Aircraft serial
32474
Aircraft time
59,744 hours, 35,276 cycles
Part
Rail
Condition
Cracked
Location
Aft Cargo
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

CRACK ON AFT CARGO BAY RAIL AT RBL 13 BS 727E. / EVALUATED DAMAGE ON AFT CARGO BAY RAIL AT RBL 13 BS 727E. CRACK DIMENSIONS : L= 0.300' AND FOUND OUT ALLOWABLE DAMAGE LIMITS IAW SRM 53-00-53-1A-2 ALLOWABLE DAMAGE 2 FIGURE 103 <BR>TOOL USED CALIPER ; ID:ATS2500; DATE DUE 03/2023; REMOVED CARGO TRACK LOCATED BTW B/S 727 TO B/S 767+11' RBL 13 IAW SRM 51-40-02;REMOVED CARGO TRACK LOCATED BTW B/S 727 TO B/S 887 RBL 13 IAW SRM 51-40-02; LOCATED AND DRILLED TRACK ASSY PN 654A0004-1350 COMMON TO FRAMES AND BAFFLE FROM BS727 TO BS 747 AND BS 767 TO BS 887;RBL 13 IAW BOEING DWG 146A7500 AND SRM 51-40-05; INSTALLED TRACK ASSY COMMON TO FRAMES AND BAFFLE FROM BS727 TO BS 747 AND BS 767 TO BS 887;RBL 13 IAW BOEING DWG 146A7500 AND SRM 51-40-02PERFORMED CUT THE TRACK BETWEEN FRAMES LOACTED B/S 747 TO B/S 767 RBL 13;VERIFIED APPLICABILITY OF REPAIR FOR CORRECTIVE ACTION ITEM 12. VERIFIED TRACK CUT BETWEEN FRAMES BS 747 AND BS 767 CORRECTIVE ACTION ITEM 13.NO OTHER DAMAGE IN REPAIR AREA.;[16] HFEC INSPECTED OPEN HOLE IAW 737 NDTM PART 6 51-00-00 PROCEDURE 16.<BR>NO CRACKS NOTED <BR>EQUIP USED: NORTEC 600 ID: ATS1465 EQUIP USED: MINIMITE ID: ATS240;LOCATED AND DRILLED TRACK SPLICE ; P/N 146A7506-20 LOT# 1461883-2 IAW SRM 53-00-53-2R-3 REPAIR 3 AND OK TO INSTALL REPAIR PARTINSTALLED [2} TRACK SPLICE BTW B/S 747 TO B/S 767 RBL 13 IAW SRM 53-00-53-2R-3 REPAIR 3 ALTERNATIVE 1

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