Service difficulty report · Support · Boeing 73779P

Difficulty date
November 9, 2021
Submitted
December 1, 2021
Operation
Air carrier
Aircraft
N7862A
Make and model
Boeing 73779P
Aircraft serial
33009
Aircraft time
48,858 hours, 32,792 cycles
Part
Support
Condition
Corroded
Location
Bs 500a-500c
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

CORROSION FWD CARGO BAY FLOOR TO SIDEWALL SUPPORT BS 500A +6; +10; +17; BS 500B +2; +6; +10; +14; BS 500C +2 RBL 26 WL 156 ; / [01] EVALUATED CORROSION AT ALL LOCATION; FOUND DEEPEST LOCATION AT BS 500C+2 RBL 26 WL 156. FOUND 0.015 REMOVED FROM ORIG 0.040 IN 1'X1' AREA FOUND TO BE OUT OF LIMITS PER SRM 53-00-53-1A-2 USING DIAL DEPTH GAUGE ATS 1225 S/N UNKNOWN; [02] VERIFIED OUT OF LIMITS; [03] FABRICATED NEW FCB RH FLOOR TO SIDEWALL SUPPORT; BS 500A-500D; LOCATED AND DRILLED IAW SRM 51-40-05-0G-0; DWG 143A7500; MATERIAL; BAC1496-444 #7075T62; LOT#5098100-1; APPLIED CHEMICAL CONVERSION COATING; IAW SRM 51-20-01-0G-0; AND OK TO PRIME; [04] VERIFIED FABRICATED NEW FCB RH FLOOR TO SIDEWALL SUPPORT; BS 500A-500D; LOCATED AND DRILLED IAW SRM 51-40-05-0G-0; DWG 143A7500; MATERIAL; BAC1496-444 #7075T62; LOT#5098100-1; APPLIED CHEMICAL CONVERSION COATING; IAW SRM 51-20-01-0G-0; AND OK TO PRIME; [05] PRIMED NEW FCB RH FLOOR TO SIDEWALL SUPPORT; BS 500A-500D; IAW SRM 51-20-01-0G-0.; [06] PRIMED NEW RH FLOOR TO SIDEWALL SUPPORT; BS 395-420; IAW SRM 51-20-01-0G-0

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