ASN Wikibase Occurrence # 36590
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| Date: | Friday 20 May 1983 |
| Time: | 14:20 |
| Type: |  Mooney M20K |
| Owner/operator: | Yale Grayson |
| Registration: | N231HT |
| MSN: | 25-0267 |
| Year of manufacture: | 1979 |
| Engine model: | CONTINENTAL TSIO-360-GB |
| Fatalities: | Fatalities: 1 / Occupants: 1 |
| Aircraft damage: | Destroyed |
| Category: | Accident |
| Location: | Old Lyme, CT -
 United States of America
|
| Phase: | En route |
| Nature: | Private |
| Departure airport: | Mattituck, NY |
| Lebanon, NH (LEB) | |
| Investigating agency: | NTSB |
| Confidence Rating: |  Accident investigation report completed and information captured |
THE ACFT COLLIDED WITH THE GROUND IN IMC AFTER THE PLT REPORTED HE LOST HIS VACUUM INSTRUMENTS. THE FLT ORIGINATED AT MATTITUCK, NY WITH A DESTINATION OF LEBANON, NH. AFTER DEPARTURE THE PLT WAS CLEARED TO CLIMB TO 7000 FT. THE INSTRUMENTRATED PILOT WAS ON AN IFR FLT PLAN. ABOUT 8 MINUTES AFTER DEPARTURE THE PILOT RADIOED THAT HE HAD EXPERIENCED A LOSS OF VACUUM AND HIS ARTIFICIAL HORIZON WAS INOPERATIVE. HE ALSO STATED HE HAD NO AUTOPILOT AND REQUESTED RADAR VECTORING. HE WAS GIVEN A HEADING OF 050 FOR RADAR VECTORING TO NORWICH VOR. ABOUT 2 MINUTES LATER THE PILOT RADIOED HE WAS 'IN TROUBLE AND IN A DIVE.' ONE MIN LATER HE RADIOED 'ONE THOUSAND FT I AM IN DEEP TROUBLE HERE.' THIS WAS THE LAST RADIO CALL FROM THE PLT. WITNESSES IN THE AREA HEARD & SAW THE ACFT COME OUT OF THE CLOUDS AT 200-300 FT & THEN CLIMB BACK INTO THE FOG BANK. SHORTLY THEREAFTER, A 'WHISTLING DIVE' WAS HEARD FOLLOWED BY THE SOUND OF A CRASH. THE WX IN THAT AREA WAS DESCRIBED AS FOG, LIGHT RAIN, & OVERCAST. EXAM OF THE ACFT WRECKAGE REVEALED THAT THE VACUUM PUMP FAILED. CAUSE:
Sources:
NTSB: https://www.ntsb.gov/ntsb/brief.asp?ev_id=20001214X43112
Revision history:
| Date/time | Contributor | Updates |
|---|---|---|
| 24-Oct-2008 10:30 | ASN archive | Added |
| 21-Dec-2016 19:23 | ASN Update Bot | Updated [Time, Damage, Category, Investigating agency] |
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