Service difficulty report · Rib · Boeing 73779P

Difficulty date
July 9, 2021
Submitted
July 27, 2021
Operation
Air carrier
Aircraft
N7820L
Make and model
Boeing 73779P
Aircraft serial
28253
Aircraft time
52,814 hours, 34,351 cycles
Part
Rib
Condition
Cracked
Location
Horizontal Stab
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

LEFT HORIZONTAL STABILIZER FRONT SPAR L/E FAIRING CRACKED AT RIB # 5 MKD DOT ; / [01] REMOVED DAMAGE RIB ON L/H HORIZONTAL L/E; RIB # 5 PER REF. 737 SRM 51-40-02-0G-0; [02] LOCATED AND DRILLED NEW RIB#5 ON L/H HORIZONTAL L/E PER REF B737-700 SRM 51-40-05-0G-0.; [03] LOCATED AND DRILLED NEW RIB#5 ON L/H HORIZONTAL L/E PER REF B737-700 SRM 51-40-05-0G-0 AND DWG 186A1305.; [04] (RII) VERIFIED LOCATION AND DRILLING OF NEW RIB #5.; [05] OK TO TREAT AND PRIME RIB AND HORIZONTAL L/E.; [06] TREATED AND PRIMED NEW HOLES AT RIB #5 ON L/H HORIZONTAL L/E PER REF B737-700 AMM 51-21-41-370-802 AND AMM 51-21-72-370-804.; [07] VERIFIED TREAT AND PRIMER APPLICATION.; [08] (RII) OK TO INSTALL NEW RIB.; [09] INSTALLED NEW RIB AT L/H HORIZONTAL STAB.; L/E; PER REF 737 SRM 51-40-02-0G-0 AND DRAWING 186A1305; [10] VERIFIED INSTALLATION.; [11] REMOVED DAMAGE RIB AND INSTALLED NEW RIB#5 ON L/H HORIZONTAL L/E PER REF B737-700 SRM 51-40-02-0G-0 AND DRAWING 186A1305.; [12] VERIFIED FINAL STEP 11.; [13] PARTS.

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