Service difficulty report · Structure · Boeing 7377H4

Difficulty date
August 3, 2021
Submitted
September 14, 2021
Operation
Air carrier
Aircraft
N491WN
Make and model
Boeing 7377H4
Aircraft serial
33867
Aircraft time
53,758 hours, 31,898 cycles
Part
Structure
Condition
Out Of Tolerance
Location
Fairing
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

OUT OF ROUND HOLE COMMON TO FAIRING STRUCTURE AND STR 25R AT BS 521 ; / [01] REAMED HOLE @ BS521 STR25R COMMON TO FAIRING STRUCTURE TO A ROUND CONDITION AND A FINAL REAM OF .247' IAW SRM 51-40-05-0G-0.; [02] VERIFIED HOLE AT BS521 STR25R ROUND AT .247 PER SRM 51-40-05-0G-0.; [03] REQUEST NDI FOR CRACK FREE CONDITION ON HOLE @ BS521 STR25R COMMON TO FAIRING STRUCTURE.; [04] HFEC INSPECTED OPEN HOLE IAW 737 NDTM PART 6 51-00-00 PROCEDURE 16; NO CRACKS NOTED. EQUIP ID#: IS000450 S/N: N500D000M120071 EQUIP ID#: ATS2407 S/N: MM1591DD064104; [05] 'REFER TO FAULT TTG8005ZSDP WHERE EA 21-153-02217 WAS ADDED AS A SUBTASK'; [06] REFER TO FAULT TTG8005ZSDP WHERE EA 21-153-02217 WAS ADDED AS A SUBTASK

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