Individually Owned: 150,657
Corporate Owned: 137,281
Luis Munoz Marin Int'l Airport
Aircraft Accident/Incident Report
San Juan
Thursday, October 7, 1993 19:40 AST
NTSB Narrative Summary Released at Completion of Accident
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.
NTSB Probable Cause Narrative
PARTIAL FAILURE OF A WING RIB DUE TO EXFOLIATION CORROSION AND INADEQUATE INSPECTION OF THE AIRCRAFT BY COMPANY MAINTENANCE PERSONNEL.
Event Information
| Type of Event | Accident |
| Event Date | 10/7/1993 |
| Event Day of the Week | Thursday |
| Time of Event | 1940 |
| Event Time Zone | Atlantic Standard Time |
| Event City | SAN JUAN |
| Event State | PUERTO RICO |
| Event Country | -- |
| Zipcode of the event site | 00937 |
| Event Date Year | 1993 |
| Event Date Month | 10 |
| MidAir Collision Indicator | No |
| On Ground Collision occurred ? | No |
| Event Location Latitude | |
| Event Location Longitude | |
| Event Location Airport | LUIS MUNOZ MARIN INT'L |
| Event Location Nearest Airport ID | SJU |
| Indicates whether the acc/inc occurred off or on an airport | On Airport |
| Distance from airport in statute miles | -- |
| Degrees magnetic from airport | -- |
| Airport Elevation | 10 |
| Weather Briefing Completeness | Unknown |
| Investigator's weather source | Weather Observation Facility |
| Time of the weather observation | 1954 Atlantic Standard Time |
| Direction of event from weather observation facility (degrees) | 360 |
| Weather Observation Facility ID | SJU |
| Elevation of weather observation facility | 10 |
| Distance of event from weather observation facility (units?) | 1 |
| Time Zone of the weather observation | AST |
| Lighting Conditions | Dusk |
| Lowest Ceiling Height | 28000 |
| Lowest Non-Ceiling Height | 2300 |
| Sky/Lowest/Cloud Conditions | Scattered |
| Sky Condition for Lowest Ceiling | Overcast |
| Visibility Runway Visual Range (Feet) | 0 |
| Visibility Runway Visual Value (Statute Miles) | 0 |
| Visibility (Statute Miles) | 13 |
| Air Temperature at event time (in degrees celsius) | 27 |
| Dew Point at event time (in degress fahrenheit) | 23 |
| Wind Direction (degrees magnetic) | 90 |
| Variable Wind Indicator | Unknown |
| Wind Speed (knots) | 6 |
| Wind Velocity Indicator | Unknown |
| Wind Gust Indicator | Not Gusting |
| Wind Gust (knots) | 0 |
| Altimeter Setting at event time (in. Hg) | 29 |
| Density Altitude (feet) | -- |
| Intensity of Precipitation | Unknown |
| METAR weather report | -- |
| Event Highest Injury | None |
| On Ground, Fatal Injuries | 0 |
| On Ground, Minor Injuries | 0 |
| On Ground, Serious Injuries | 0 |
| Injury Total Fatal | -- |
| Injury Total Minor | -- |
| Injury Total None | 2 |
| Injury Total Serious | -- |
| Injury Total All | -- |
| Investigating Agency | NTSB |
| NTSB Docket Number (internal use) | 1780 |
| NTSB Notification Source | -- |
| NTSB Notification Date | Oct 8 1993 12:00AM |
| NTSB Notification Time | 1120 |
| Fiche Number and/or location -used to find docket information | IMAGE |
| Date of most recent change to record | Dec 11 2000 1:42PM |
| User who most recently changed record | dbo |
| Basic weather conditions | Visual Meteorological Cond |
| FAA District Office | -- |
Aircraft Involved |
|
|---|---|
Aircraft #1 |
|
| Aircraft Registration Number | N781T |
| NTSB Number | MIA94LA003 |
| Missing Aircraft Indicator | N |
| Federal Aviation Reg. Part | Part 135: Air Taxi & Commuter |
| Type of Flight Plan filed | IFR |
| Flight plan Was Activated? | -- |
| Damage | Substantial |
| Aircraft Fire | None |
| Aircraft Explosion | None |
| Aircraft Manufacturer's Full Name | DOUGLAS |
| Aircraft Model | DC-3C |
| Aircraft Series Identifier | DC-3C |
| Aircraft Serial Number | 4306 |
| Certified Max Gross Weight | 26900 |
| Aircraft Category | Airplane |
| Aircraft Registration Class | U.S. Registered/U.S. Soil |
| Aircraft is a homebuilt? | No |
| Flight Crew Seats | -- |
| Cabin Crew Seats | -- |
| Passenger Seats | -- |
| Total number of seats on the aircraft | 2 |
| Number of Engines | 2 |
| Fixed gear or retractable gear | Retractable |
| Aircraft, Type of Last Inspection | AAIP |
| Date of Last Inspection | Sep 4 1993 12:00AM |
| Airframe hours since last inspection | 39 |
| Airframe Hours | 36964 |
| ELT Installed | Yes |
| ELT Activated | Unknown |
| ELT Aided Location of Event Site | Unknown |
| ELT Type | -- |
| Aircraft Owner Name | TOL AIR SERVICES, INC. |
| Aircraft Owner Street Address | P.O. BOX 37670 |
| Aircraft Owner City | AIRPORT STATION |
| Aircraft Owner State | PR |
| Aircraft Owner Country | |
| Aircraft Owner Zipcode | 00937 |
| Operator is an individual? | -- |
| Operator Name | |
| Operator Same as Owner? | Yes |
| Operator Is Doing Business As | -- |
| Operator Address Same as Owner? | Yes |
| Operator Street Address | |
| Operator City | |
| Operator State | |
| Operator Country | |
| Operator Zip code | |
| Operator Code | FRUA |
| Owner has at least one certificate | Yes - certificate holder |
| Other Operator of large aircraft? | No |
| Certified for Part 133 or 137 Operation | Unknown |
| Operator Certificate Number | -- |
| Indicates whether an air carrier operation was scheduled or not | Non-scheduled |
| Indicates Domestic or International Flight | International |
| Operator carrying Pax/Cargo/Mail | Cargo |
| Type of Flying (Per_Bus / Primary) | Unknown |
| Second Pilot on Board | Yes |
| Departure Point Same as Event | No |
| Departure Airport Code | MDST |
| Departure City | SANTIAGO |
| Departure State | OF |
| Departure Country | |
| Departure Time | 1738 |
| Departure Time Zone | AST |
| Destination Same as Local Flt | crash at destination city |
| Destination Airport Code | |
| Destination City | |
| Destination State | |
| Destination Country | |
| Specific Phase of Flight | Landing |
| Report sent to ICAO? | -- |
| Evacuation occurred | -- |
| Date of most recent change to record | Dec 20 2002 12:42PM |
| User who most recently changed record | dbo |
| Since inspection or accident | -- |
| Event Location Runway Number and Location | 10 |
| Runway Length | 8016 |
| Runway Width | 150 |
| Sight Seeing flight | No |
| Air Medical Flight | No |
| Medical Flight | -- |