McDonnell Douglas DC-9-82 N918TW
2 September 1993 · St. Louis, Missouri, United States · No injuries
Summary
On 2 September 1993 at about 17:03 local time, a McDonnell Douglas DC-9-82 registered N918TW, operated by TWA, Inc., was involved in an incident near St. Louis, Missouri, United States. 108 people were on board and nobody was injured. The NTSB has published a probable cause for this accident; it is quoted in full below.
The record
- Date
- at 17:03
- Classification
- Incident
- Location
- St. Louis, Missouri, United States
- Nearest airport
- Lambert-St. Louis Int'l (STL)
- Coordinates
- Not recorded
- Aircraft
- McDonnell Douglas DC-9-82
- Registration
- N918TW
- Category
- Airplane
- Engines
- 2
- Operator
- TWA, Inc.
- Operating rule
- Part 121: Air Carrier
- Purpose of flight
- Unknown
- Phase of flight
- Not recorded
- Route
- New York → Unknown
- Aircraft damage
- Not recorded
- Weather
- VMC
- Light
- Not Reported
- NTSB number
- CHI93IA352
People
Nobody was injured.
| On board | Died | Serious | Minor | Uninjured |
|---|---|---|---|---|
| 108 | 0 | 0 | 0 | 108 |
Probable cause
a fatigue failure of the power transfer unit caused by a material defect which resulted in a total hydraulic system failure.
Quoted verbatim from the NTSB record. This site does not paraphrase or interpret it.
Read the full NTSB narrative
AS THE CAPTAIN WAS TURNING THE AIRPLANE OFF THE RUNWAY FOLLOWING ITS LANDING ROLL HE SAID IT WAS '...EXTREMELY DIFFICULT TO TURN.' THE CAPTAIN SAID THE AIRPLANE TURNED TO A 45 DEGREE ANGLE TO THE RUNWAY AND WOULD GO NO FURTHER. THE STEERING SYSTEM FAILED AND THE CAPTAIN ATTEMPTED TO STOP THE AIRPLANE ON THE TAXIWAY USING BRAKES AND REVERSE THRUST. THE AIRPLANE WOULD NOT STOP AND ROLLED OFF ONTO THE GRASS AREA ADJACENT TO THE TAXIWAY. EXAMINATION OF THE BRAKE SYSTEM FOUND THE HYDRAULIC SYSTEM POWER TRANSFER UNIT'S (PTU) HOUSING WAS CRACKED AROUND ITS ENTIRE CIRCUMFERENCE. THE PTU ON THE INCIDENT AIRPLANE WAS AN EARLY STYLE UNIT ACCORDING TO THE MANUFACTURER'S SERVICE BULLETIN. THE SERVICE BULLETIN ADVISED OWNERS OF THE AIRPLANE TO REPLACE THE ORIGINAL ALUMINUM HOUSING WITH A CAST IRON TYPE. EXAMINATION OF THE PTU'S HOUSING FRACTURE SURFACES REVEALED SHRINKAGE CAVITIES, AND LARGE SILICON INCLUSIONS.
Quoted verbatim from the NTSB record.
Other McDonnell Douglas DC-9 accidents
| Date | Aircraft | Location | Operator | Outcome | Died |
|---|---|---|---|---|---|
| 12 Mar 1993 | McDonnell Douglas DC-9-31 | Saint Louis, Missouri, United States | Trans World Airlines, Inc. | No injuries | - |
| 18 Jun 1993 | McDonnell Douglas DC-9-82 | Savannah, Georgia, United States | American Airlines, Inc. | No injuries | - |
| 26 Apr 1993 | McDonnell Douglas DC-9-82 | Denver, Colorado, United States | Continental Airlines | No injuries | - |
| 27 Apr 1993 | McDonnell Douglas DC-9-82 | Denver, Colorado, United States | - | Minor injuries | - |
| 13 Oct 1992 | McDonnell Douglas DC-9-82 | Denver, Colorado, United States | Continental Airlines, Inc. | No injuries | - |
| 21 Oct 1992 | McDonnell Douglas DC-9-32 | Houston, Texas, United States | Aerovia de Mexico | Minor injuries | - |
Other accidents in this area
| Date | Aircraft | Location | Operator | Outcome | Died |
|---|---|---|---|---|---|
| 18 Sep 1993 | Luscombe 8F | Festus, Missouri, United States | - | No injuries | - |
| 10 Apr 1993 | Boeing 767-233 | Kansas City, Missouri, United States | Air Canada | No injuries | - |
| 19 Nov 1993 | Hughes 369HS | Antonia, Missouri, United States | Drug Enforcement Admin. | Fatal | 1 |
| 3 Oct 1993 | Cessna 150G | Osceola, Missouri, United States | - | No injuries | - |
| 27 Jan 1993 | Piper PA-24 | Buffalo, Missouri, United States | LEE, Albert E. | Serious injuries | - |
| 10 Oct 1993 | Cessna 172 | Independence, Missouri, United States | - | No injuries | - |