- Date
- May 2, 1989, 14:40 local (19:40 UTC)
- Place
- Minneapolis, MN
- Injuries
- 96 uninjured
- Damage
- Minor damage
- Phase of flight
- Enroute
- Aircraft
- N434AAMcdonnell Douglas DC-9-82
- Weather
- Visual (VMC) · Day
- Status
- Completed · report August 26, 1992
- Report
- Approved by Office Director
- Safety recommendations
- Yes
- FAA report
- 19890502036339I
- Case key
- 14282
From the NTSB’s public API. By law, NTSB reports can’t be used as evidence in lawsuits over the incident.
On this page
Probable cause
Failure of the hydraulic power transfer unit shut-off (ptu s/o) valve due to failed (fatigued) valve body attach screws.
Sequence of events
NTSB’s coding before 2008: each occurrence and phase of flight, and the causes and factors under it. The codes are defined in NTSB’s coding manual.
Airframe/component/system failure/malfunction
Hydraulic system,shutoff valve - failure,totalCause
Hydraulic system - no pressureCause
On ground/water encounter with terrain/water
Terrain condition - runwayCause
Hydraulic system - unavailableCause
Aircraft
- Registration
- N434AA
- Reported as
- Mcdonnell Douglas DC-9-82
- Category
- Airplane
- Serial number
- 49452
- Engine
- P&W JT8D-217A, 14,500 lbs thrust, turbo fan
- Damage
- Minor damage
- Flight
- Part 121
- Registered owner
- American Airlines
- Airworthiness certificate
- Standard, Transport
- Departed
- SEA · Seattle, WA
- Destination
- ORD · Chicago, IL
- Flight plan
- IFR
- Airport
- MSP · Minneapolis St Paul Intl, runway 29L, 10,000 × 200 ft, asphalt
N434AARegistration cancelled Sep 16, 2019 · Mcdonnell Douglas DC-9-83(MD-83)Airframe modelMcdonnell Douglas DC-9-83(MD-83)Engine modelPratt & Whitney JT8D series
Matched to the registry by N-number and the event date; the registry’s history has gaps, so older matches can be wrong. Compare the reported make and model.
Flight crew
As NTSB recorded them. NTSB leaves out names.
- Role
- Pilot
- Age
- 39
- Certificate
- Airline transport
- Airplane ratings
- Multi-engine land, Single-engine land
- Instrument ratings
- Airplane
- Medical
- Class 1, Valid Medical--no waivers/lim.
- Seat
- Left
- Flight hours
- 7,450 total · 150 in the last 90 days · 50 in the last 30 days · 2 in the last 24 hours
Weather
- Conditions
- Visual (VMC) · Day
- Wind
- 290° at 9 knots
- Visibility
- 20 statute miles
- Lowest ceiling
- 7,000 ft broken
- Temperature
- 55 °F, dew point 27 °F
- Altimeter
- 30.00 inHg
- Observed at
- MSP
FAA reports on this event · 1
The FAA’s own accident and incident reports, matched to the aircraft by N-number and date.