Service difficulty report · Channel · Boeing 73779P

Difficulty date
June 24, 2021
Submitted
July 21, 2021
Operation
Air carrier
Aircraft
N7820L
Make and model
Boeing 73779P
Aircraft serial
28253
Aircraft time
52,814 hours, 34,351 cycles
Part
Channel
Condition
Corroded
Location
Bs 500a-500d
Stage of operation
IN
How discovered
V
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 CARGO COMP FLOOR PANEL SUPPORT ZEE CHANNEL SCREW HOLES WITH SURFACE CORROSION FROM BS 500D TO BS 500A RBL-25 MKD 126-07. ; / [01] INSPECTED FWD CARGO R/H ZEE CHANNEL STA500A TO 500D; CORROSION IS AROUND AND AT FASTENER HOLES; FOUND OUT OF LIMITS REF. B737-7 SRM 53-00-53-1A-2; FIG.103.; [02] VERIFIED WORK PERFOROMED; [03] CORROSION AROUND THE HOLES FOUND OUT OF LIMITS AT FWD CARGO COMPARTMENT ZEE CHANEL FLOOR SUPPORT BETWEEN FS 500A-500D IN REF B737-700 SRM 53-00-53-1A-2 FIGURE 103 DETAIL 'D'; [04] LOCATED AND DRILLED ZEE CHANNEL FLOOR SUPPORT IN REF B737-700 SRM 51-40-05-0G-0; [05] VERIFIED STEP3; [06] VERIFIED STEP 4; [07] OK TO TREAT AND PRIME Z CHANNEL; [08] TREATED AND PRIMED ZEE CHANNEL IN RED B737-700 SRM 51-20-01-0G-0; [09] VERIFIED WORK PERFORMED; [10] STEP 4 IS RII; [11] FABRICATED NEW ZEE CHANNEL FLOOR SUPPORT AT FWD CARGO COMPARTMENT BETWEEN FS 500D-500A R/H IN REF DW 143A7500;WILL BE INSTALLED ZEE CHANNEL AT TASK CARD TTG8Q004BD5U; [12] VERIFIED FABRICATED NEW ZEE CHANNEL FLOOR SUPPORT AT FWD CARGO COMPARTMENT BETWEEN FS 500D-500A R/H IN REF DW 143A7500;WILL BE INSTALLED ZEE CHANNEL AT TASK CARD TTG8Q004BD5U

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