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| Date: | Thursday 7 October 1993 |
| Time: | 20:40 LT |
| Type: |  Douglas DC-3C |
| Owner/operator: | Tol Air Services |
| Registration: | N781T |
| MSN: | 4306 |
| Year of manufacture: | 1943 |
| Total airframe hrs: | 36964 hours |
| Engine model: | P&W R1830-92 |
| Fatalities: | Fatalities: 0 / Occupants: 2 |
| Aircraft damage: | Substantial |
| Category: | Accident |
| Location: | San Juan -
 Puerto Rico
|
| Phase: | Landing |
| Nature: | Unknown |
| Departure airport: | Santiago, OF (MDST) |
| Investigating agency: | NTSB |
| Confidence Rating: |  Accident investigation report completed and information captured |
AFTER AN UNEVENTFUL LANDING WHILE TAXIING, THE CAPTAIN NOTICED THAT A SECTION OF THE LEFT WING WAS BENT UP. EXAMINATION OF THE AIRPLANE REVEALED THAT RIB NO. 19 IN THE LEFT WING FAILED CHORDWISE MIDPOINT BETWEEN A ROW OF RIVETS AND NUTPLATES ON THE LOWER ATTACH ANGLE DUE TO EXFOLIATION CORROSION. THE FAA APPROVED 50-HOUR INSPECTION REQUIRES VISUAL INSPECTION OF THE ATTACH ANGLE AND BOLTS BUT DOES NOT REQUIRE REMOVAL OF THE WING TIP.
Probable Cause: PARTIAL FAILURE OF A WING RIB DUE TO EXFOLIATION CORROSION AND INADEQUATE INSPECTION OF THE AIRCRAFT BY COMPANY MAINTENANCE PERSONNEL.
Accident investigation:
 |
|
Sources:
NTSB MIA94LA003
History of this aircraft
Other occurrences involving this aircraft
| 30 December 2003 | N781T | Tol Air Services | 0 | Saint Thomas-Cyril E. King Airport (STT) |  |
sub |
| Gear collapse | ||||||
Revision history:
| Date/time | Contributor | Updates |
|---|---|---|
| 16-Mar-2024 15:38 | ASN Update Bot | Added |
Corrections or additions? ... Edit this accident description
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