Mooney M20K accident near Holden, Massachusetts, November 16, 1988
On November 16, 1988 at about 11:50 pm local time, a Mooney M20K, registered N1170Z, was destroyed in an accident near Holden, Massachusetts. It was a personal flight under general aviation rules (Part 91). 1 person was killed. The weather was instrument conditions (cloud, fog or low visibility).
The NTSB's probable cause their words, unchanged
INFLIGHT LOSS OF CONTROL DUE TO SPATIAL DISORIENTATION AND CONTACT WITH TREES PRIOR TO REGAINING CONTROL AFTER THE PILOT EXPERIENCED AN UNKNOWN PROBLEM WITH THE AUTOPILOT. CONTRIBUTING WAS THE LACK OF RECENT NIGHT EXPERIENCE.
Source: NTSB aviation accident database, copy made October 5, 2026. Docket and reports at the NTSB.
What the record shows
- Date
- November 16, 1988 · about 11:50 pm local time
- Place
- Holden, Massachusetts
- Type
- Accident
- Injuries
- 1 person was killed.
- Weather
- instrument conditions (cloud, fog or low visibility)
- Aircraft
- Mooney M20K · all M20Ks on the register
- Registration
- N1170Z · registry record · serial 25-0704
- Damage
- Destroyed
- Flight
- Personal flight · general aviation rules (Part 91)
The NTSB's narrative final · quoted from the NTSB record
THE ACFT MADE A NIGHT INSTRUMENT DEPARTURE WITH A MAXIMUM ASSIGNED ALTITUDE OF 4,000 FT. THE PLT FAILED TO FOLLOW HIS DEPARTURE INSTRUCTIONS CONCERNING ROUTING. HE CLIMBED TO 4,600 FT AND WHEN QUERIED, SAID HE WAS HAVING AUTOPILOT PROBLEMS. A FEW MINUTES LATER, THE ACFT DISAPPEARED FROM RADAR. THE ACFT IMPACTED A LINE OF TREES AT A HIGH SPEED AND WAS EXTENSIVELY BROKEN UP. THE WRECKAGE WAS SCATTERED OVER 450 FT. THE AUTOPILOT PROBLEM WAS NOT IDENTIFIED DUE TO THE EXTENT OF IMPACT DAMAGE; HOWEVER, NO PROBLEM WAS NOTED WITH THE AIRFRAME OR ENGINE. THE PLT WAS CURRENT WITH INSTRUMENTS, BUT NOT FOR NIGHT FLIGHT. THE ACFT PITOT STATIC SYSTEM AND TRANSPONDER WERE BOTH OUT OF INSPECTION.
The complete narrative as the NTSB published it. The NTSB's docket holds the report as a PDF and any photographs, statements and other documents from the investigation.
The factual record from the NTSB's investigation tables, in plain English
Pilot
- Certificate: private
- Ratings: single-engine land; instrument: airplane
- Flight time: 623 hours in all; 206 in this make and model; 31 in the last 90 days; 10 in the last 30 days; 467 as pilot in command
- Medical certificate: Class 3 (valid medical--w/ waivers/lim.)
- Seat: unk
The aircraft
- Airframe total time: 1,783 hours
- Last inspection: annual inspection, October 5, 1988
- Maximum gross weight: 2,900 lb
- Seats: 4
- Landing gear: retractable
- Engine: Continental TSIO-360-LB1 (piston); 0 hours total
The flight
- Departed from: ORH Worcester MA at 11:43 pm
- Destination: BDR Bridgeport CT
- Flight plan: IFR
- Runway 0
Weather at the time
- Light: night, dark
- Wind: from 180° at 7 knots
- Visibility: 7 statute miles
- Sky: overcast at 600 ft; not recorded
- Temperature: 52°F (11°C), dew point 48°F (9°C)
- Altimeter: 30.00 inHg
- Observation at 11:50 pm from ORH, 6 miles away
Injuries
| Fatal | Serious | Minor | None | |
|---|---|---|---|---|
| Crew | 1 |
Documents from the investigation the NTSB's docket: the evidence folder behind the report
The docket, the folder of records gathered during an investigation (maintenance records, photographs, witness statements, examinations), has not been read from the NTSB for this case yet; the list appears here once it has. Open the docket at the NTSB.
Everything on this page comes from the NTSB's public records. The narrative, probable cause and findings are the NTSB's own words; the coded tables behind the report are written out in plain English, with pilots' ages, home towns and medical details left out. The documents and photographs are the NTSB's docket, shown as the NTSB released them. This site's own text never names anyone involved. A preliminary report can change; the final report usually follows one to two years later, and the page is refreshed when it does.