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Last updated: 12 July 2020
Status:Schlussbericht
Datum:Dienstag 13 Januar 1998
Zeit:08:10
Flugzeugtyp:Silhouette image of generic LJ25 model; specific model in this crash may look slightly different
Learjet 25B
Fluggesellschaft:American Corporate Aviation
Kennzeichen: N627WS
Werknummer: 25-170
Baujahr: 1974
Betriebsstunden:8943
Triebwerk: 2 General Electric CJ610-6
Besatzung:Todesopfer: 2 / Insassen: 2
Fluggäste:Todesopfer: 0 / Insassen: 0
Gesamt:Todesopfer: 2 / Insassen: 2
Sachschaden: Zerstört
Konsequenzen: Written off (damaged beyond repair)
Unfallort:3,2 km (2 Meilen) E of Houston-George Bush Intercontinental Airport, TX (IAH) (   USA)
Flugphase: Annäherung (APR)
Betriebsart:Leerflug
Flug von:Houston-William P. Hobby Airport, TX (HOU/KHOU), USA
Flug nach:Houston-George Bush Intercontinental Airport, TX (IAH/KIAH), USA
Unfallbericht:
Descended below the glideslope during the second runway 26 approach, struck trees and crashed. The first officer's instruments were displaying a false full fly-down glideslope indication because of a failed amplifier in the navigation receiver.

Probable Cause:

PROBABLE CAUSE: "The flight crew's continued descent of the airplane below the glideslope and through the published decision height without visual contact with the runway environment. Also, when the captain encountered difficulty tracking the localizer course, his improper decision to continue the approach by transferring control to the first officer instead of executing a missed approach contributed to the cause. In addition, the following were factors to the accident: (1) American Corporate Aviation's failure to provide an airworthy airplane to the flight crew following maintenance, resulting in a false glideslope indication to the first officer; (2) the flight crew's failure to follow company crew coordination procedures, which called for approach briefings and altitude callouts; and (3) the lack of an FAA requirement for a ground proximity warning system on the airplane. "

Accident investigation:
cover
Investigating agency: NTSB
Status: Investigation completed
Duration: 1 year and 3 months
Accident number: FTW98MA096
Download report: Summary report

Informationsquelle:
» NTSB


Sicherheitsempfehlungen

NTSB issued 2 Safety Recommendations

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Map
This map shows the airport of departure and the intended destination of the flight. The line between the airports does not display the exact flight path.
Distance from Houston-William P. Hobby Airport, TX to Houston-George Bush Intercontinental Airport, TX as the crow flies is 38 km (24 miles).
Accident location: Approximate; accuracy within a few kilometers.

This information is not presented as the Flight Safety Foundation or the Aviation Safety Network’s opinion as to the cause of the accident. It is preliminary and is based on the facts as they are known at this time.
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