Service difficulty report · Stringer · Boeing 7378H4

Difficulty date
October 20, 2021
Submitted
October 25, 2021
Operation
Air carrier
Aircraft
N8307K
Make and model
Boeing 7378H4
Aircraft serial
36987
Aircraft time
31,538 hours, 14,219 cycles
Part
Stringer
Condition
Cracked
Location
R/H Mlg W/W
Stage of operation
NR
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

RIGHT FORWARD PANEL IN WHEEL WELL BELOW HYDRALIC FILTER CRACKEDCRACK RUNS VERTICAL 6 INCHES LONG APPROX 8' FROM BOTTOM STRINGER CRACK IS LOCATED BETWEEN RBL31.83 AND RBL 40.00 PERFORMED E.A. 1-A57-13410 REV 01 ACTION REQ. REPETIVE INSPEC ACTION. REMOVE ALUM. FOIL TAPE AND INSP. CRACK FOR ADDITIONAL GROWTH. IF NO ADDITIONAL GROWTH; REAPPLY SPEED TAPE; IF CRACK HAS GROWN BUT IS STILL WITHIN LIMITS OF STEP 1 OF THIS E.A.; STOP DRILL THE CRACK PER 737-700/800 SRM 51-10-02 AND APPLY SPEED TAPE. INSP THRESHOLD- 100 FLIGHT CYCLES REPEAT INSP INTERNAL- 100 FLIGHT CYCLES. PERMANENT REPAIR-LIMIT-ACTION REQUIRED. ACCOMPLISH A PERMANENT REPAIR AS GIVEN IN 737-700/800 SRM 51-70-04 REPAIR 10 OR AS AN ALT; REPAIR PART OF THE CRACK SO THAT CRACK LENGTH IS LESS THAN OR EQUAL TO THE MAX ALLOWABLE DAMAGE LIMIT. CONTINUE OF LOG PAGE 0273340EAPPLY THE INTERIM SEAL OVER THE CRACK THAT IS LEFT AS GIVEN IN 737-700/800 SRM 57-10-10 PARA 2.C.(4) / ALLOWABLE DAMAGE 2. PERMANENT REPAIR TIME LIMIT: 600 FLIGHT CYCLES. OK FOR SERVICE.REPETITIVE ACTION REQUIRED /

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