Service difficulty report · Rib · Boeing 73771B

Difficulty date
February 1, 2022
Submitted
February 4, 2022
Operation
Air carrier
Aircraft
N7845A
Make and model
Boeing 73771B
Aircraft serial
29366
Aircraft time
44,940 hours, 29,285 cycles
Part
Rib
Condition
Cracked
Location
Horizontal Stab
Stage of operation
NR
How discovered
9
Nature of condition
O
Precautionary procedure
O

As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.

What was found

LEFT HORIZONTAL STABILIZER; RIB ASSY. #4 (STAB STA 120.30) STIFFENER LOWER EDGE CRACK NOTED. ; LEFT HORIZONTAL STAILIZER; RI ASSY. #4 (STA STA 120.30) STIFFENER #4 LOWER EDGE CRACK NOTED. / PERFORMED GENERAL VISUAL INSPECTION OF ALL AREAS WITHIN THE REPAIR AREA; AS PER BOEING SRM 55-10-09-2R-4.; [12] (RII) VERIFIED STEP #10.; [13] OK TO LOCATE AND DRILL REPAIR AREA.; LOCATED AND DRILLED NEW REPAIR PARTS AT LEFT HORIZONTAL STABILIZER; RIB ASSY.#4 (STAB STA 120.30) STIFFENER LOWER EDGE IAW B737-700 SRM 55-10-09-2R-4 REPAIR 4 FIG 202.; [15] (RII) VERIFIED STEP #14; [16] OK TO TREAT AND PRIME.; [17] TREATED AND PRIMED AREA AND NEW REPAIR PARTS HOLES IAW B737-700 SRM 51-20-01-0G-0; [18] VERIFIED STEP #17; [19] (RII) OK TO INSTALL NEW REPAIR PARTS.; [20] MIXED SEALANT 087B002BM654SKN40 AT 12:00 AM 2/2/22. SQUEEZE OUT TIME BY 2:00 AM 2/2/22.; [21] INSTALLED REPAIR PARTS ON LH HORIZONTAL STABILIZER RIB ASSY. #4 STIFFENER IAW SRM 51-40-02-0G-0 AND SRM 55-10-09-2R-4.; [22] (RII) VERIFIED STEPS #20 AND #21. (FINAL) REMOVED DAMAGE AT LEFT HORIZONTAL STABILIZER; RIB ASSY.#4 (STAB STA 120.30) STIFFENER LOWER EDGE IAW B737-700 SRM 55-10-09-2R-4 REPAIR 4 FIG 202. LOCATED AND DRILLED NEW REPAIR PARTS AT LEFT HORIZONTAL STABILIZER; RIB ASSY.#4 (STAB STA 120.30) STIFFENER LOWER EDGE IAW B737-700 SRM 55-10-09-2R-4 REPAIR 4 FIG 202. INSTALLED REPAIR PARTS ON LH HORIZONTAL STABILIZER RIB ASSY. #4 STIFFENER IAW SRM 51-40-02-0G-0 AND SRM 55-10-09-2R-4.;

More about the Boeing 737-71B