# Accident 19980418007149A: Amtr Q2, Siloam Springs, AR, April 18, 1998

- Type: FAA accident report (Accident/Incident Data System), as reported
- Date: April 18, 1998, 20:30 local time
- Place: Siloam Springs, AR
- Airport: Siloam Springs Ndb
- Damage: Destroyed
- Phase of flight: Fcd/Prec Ldg From Cruise
- Operating rules: General operating rules (Part 91)
- Location: 36.1800° N, 94.5393° W: From the FAA, an estimate near the named town, within about 3 miles
- Nearby events: https://openairdocs.org/map.md?lat=36.1800&lon=-94.5393&mi=10
- Aircraft: N996DT, a cancelled registration (https://openairdocs.org/deregistered/N996DT-1998-11-24) (OpenAirDocs)
- Registry model: Foster D T/Hilsman D Q2 (registry code 05603ZO, https://openairdocs.org/model/foster-d-t-hilsman-d-q2) (OpenAirDocs)
- Reported make and model: AMTR Q2
- Reported engine: AMTRRM 2100D
- People aboard: 2
- Fatal injuries: 2
- Pilot flight hours: 1,028 total, 77 in this make and model, 7 in the last 90 days
- NTSB investigation: [NTSB FTW98FA186](https://openairdocs.org/ntsb/FTW98FA186) (OpenAirDocs)
- FAA source: FAA Aviation Safety Information Portal (https://asip.faa.gov/)
- Page: https://openairdocs.org/incident/19980418007149A

## Narrative

As the FAA filed it, in capitals; the FAA replaces private details with ^PRIVACY DATA OMITTED^.

(TTY) EXPERI ACFT WAS ON A MAINTENANCE FLIGHT WHEN IT CRASHED UNDER UNKNOWN CIR, 2 POB SUFFERED FATAL INJ. SILOAM SPRINGS, AR. (.4)THE AMATEUR-BUILT EXPERIMENTAL QUICKIE AIRPLANE, OCCUPIED BY A COMMERCIAL PILOT AND A PILOT-RATED PASSENGER, WHO WERE THE CO-OWNERS/BUILDERS OF THE AIRPLANE, IMPACTED THE GROUND IN A STEEP LEFT BANK DURING A FORCED LANDING FOLLOWING A PARTIAL LOSS OF ENGINE POWER.  DISASSEMBLY OF THE ENGINE REVEALED THAT SIX CYLINDER HEAD HOLD-DOWN NUTS WERE LOOSE, AND COMBUSTION GASES HAD BEEN LEAKING BETWEEN THE CYLINDER HEADS AND THE BARRELS OF THE #2, #3, AND #4 CYLINDERS.  THE ESCAPING GASES CUT A PASSAGE ABOUT 3/4 INCH IN DIAMETER THROUGH THE #4 CYLINDER HEAD, RESULTING IN THE PARTIAL LOSS OF ENGINE POWER.  MAINTENANCE RECORDS INDICATED NEW CYLINDER HEADS WERE INSTALLED 33 HOURS BEFORE THE ACCIDENT IN MAY 1997.  A CONDITION INSPECTION OF THE AIRPLANE, WHICH WOULD HAVE INCLUDED A CYLINDER COMPRESSION CHECK, WAS DUE IN NOVEMBER 1997, BUT HAD NOT BEEN PERFORMED.  ACCORDING TO A FAMILY MEMBER, THE TWO OWNERS WERE IN THE PROCESS OF PERFORMING A CONDITION INSPECTION ON THE DAY OF THE ACCIDENT;  HOWEVER, NEITHER OWNER HELD A REPAIRMAN CERTIFICATE F                       OR THE AIRPLANE OR WAS A CERTIFICATED AIRFRAME AND POWERPLANT MECHANIC. (-23) SEE NARRATIVE #FTW98FA186

## The NTSB's investigation of this event (1)

From the NTSB's public API. Aircraft are matched to registry aircraft by N-number and event date, checked against the reported serial number, make and model; the registry's history has gaps, so older matches can be wrong. Compare the reported make and model.

- [NTSB FTW98FA186](https://openairdocs.org/ntsb/FTW98FA186), Apr 19, 1998: Foster/Hilsman Q2 (N996DT), Siloam Springs, AR, destroyed, 2 fatal. Probable cause: The pilot's failure to maintain aircraft control during the forced landing. Factors were the failure of the #4 cylinder head which resulted in a partial loss of engine power and the…

From the FAA Accident/Incident Data System. Reports are matched to registry aircraft by N-number and event date, checked against the reported make and model; the registry's history has gaps, so older matches can be wrong. Compare the reported make and model. For accidents, the NTSB's own investigation is the fuller record.

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