Service difficulty report · Rail · Boeing 73776N

Difficulty date
November 16, 2021
Submitted
December 13, 2021
Operation
Air carrier
Aircraft
N7722B
Make and model
Boeing 73776N
Aircraft serial
32668
Aircraft time
49,599 hours, 25,042 cycles
Part
Rail
Condition
Corroded
Location
Fuselage
Stage of operation
UK
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 ON AFT CARGO BAY RAIL AT RBL 3 BS 727E; BS 767+5. ; / [01] REMOVED CORROSION ON RAIL ; AFT CARGO BAY AT RBL 3; BS 727E; BS 767+5. MEASURES:BS727E L=2'; W=0.400'; BS767+5 L=2.100'; W=0.350'. IAW; SRM 51-10-02-0G-0.; [06] EVALUATED RAIL ON AFT CARGO BAY AT RBL 3 BS727E; MEASURES: L=2'; W=0.400'; D=0.001'. ORIGINAL THICKNESS 0.063'; MATERIAL LOSS 0.001'; REMAINING MATERIAL0.062'.THE RAIL IN THIS BS IS FOUND WITHIN LIMITS. AND BS 767+5. MEASURES: L=2.100'; W=0.350'; D=0.010'. ORIGINAL THICKNESS 0.071'; MATERIAL LOSS 0.010'; REMAINING MATERIAL 0.061'. THE RAIL IN THIS BS IS OUT OF LIMITS. IAW. SRM 53-00-53-1A-2; ALLOWABLE DAMAGE 2; STEP 4(2).OK TO ALODINE AND PRIMER IN BS 727E; RBL 3.; [15] LOCATED AND DRI

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