Service difficulty report · None · Boeing 73786J

Difficulty date
August 8, 2021
Submitted
October 27, 2021
Operation
Air carrier
Aircraft
N377AR
Make and model
Boeing 73786J
Aircraft serial
37753
Aircraft time
36,430 hours, 16,659 cycles
Part
None
Condition
None
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

DURING TRANSIT CHECK, IT WAS DETECTED A SEVERAL LIGHTNING STRIKES ON NEAR LEFT SIDE RADOME AND RH WINGLET TIP. MAINTENANCE PERSONNEL PERFORMED A LIGHTNING STRIKE CONDITIONAL INSPECTION IAW AMM 05-51-19, DETECTING SEVERAL LIGHTNING STRIKES ON NEAR LEFT SIDE RADOME; ON RH WINGLET TIP AND CAP; ON STA 199 AND 14" DOWN FROM S-24L; ON FUSELAGE SKIN STA 355.5 BETWEEN S-26L AND S-27L; ON STA 374.5 BETWEEN S-26L AND S-27L; ON STA 497 BETWEEN S-26L AND S-25L; ON STA 497 BETWEEN S-26L AND S-25L; ON STA 535 BETWEEN S-26L AND S-25L; ON STA 727I+7.5 BETWEEN S-24L AND S-25L; ON STA 727I+7.5 BETWEEN S-24L AND S-25L; ON FUSELAGE FASTENER STA 574.5 BETWEEN S-26L AND S-25L; ON STA 618.5 BETWEEN S-26L AND S-25L; ON STA 727G BETWEEN S-24L AND S-25L; ON SKIN OF LEFT A/C BAY ACCESS DOOR, AT 35.5" FROM THE LEADING EDGE AND 11.5" FROM THE LEFT EDGE; ON WASHERS OF THE OUTER SKIN LEFT A/C BAY ACCESS DOOR. THE WO´S 7698547, 7698547, 7698549, 7698564, 7698566, 7698567, 7698569, 7698570, 7698571, 7698572, 7698573, 7698574, 7698576, 7698577 AND 7698578 WERE ISSUED TO REPAIR THE DAMAGES DETECTED; DAMAGES WERE EVALUATED IAW SRM 53-00-01, ALLOWABLE DAMAGE 5, PARAGRAPH 4.A(6)(B) AND THERE WERE DEFERRED TO 350 FC AND 24 MONTHS AND SRM 53-40-70, ALLOWABLE DAMAGE 5, PARAGRAPH 4.A.(3); DAMAGES WERE PERMITTED AND REMOVED IAW SRM 53-30-01, SRM 57-30-01, REPAIR 6, PARAGRAPH 4 AND CHEMICAL CONVERSION COATING WERE APPLIED IAW SRM 57-30-01, ALLOWABLE DAMAGE 2, PARAGRAPH 2.D(2)(A); ULTRASONIC INSPECTIONS WITH THICKNESS MEASUREMENT WERE PERFORMED IAW B737 NDTM PART 4, 51-00-00, PROCEDURE 2; THE WASHERS ON THE LEFT A/C BAY ACCESS DOOR WERE REPLACED IAW SRM 51-40-20, PARAGRAPH 9, ALL CORRECT.

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