Narrative: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:
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Investigating agency: | NTSB  |
Status: | Investigation completed |
Duration: | 1 year and 3 months | Accident number: | FTW98MA096 | Download report: | Summary report
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Classification:
Controlled Flight Into Terrain (CFIT) - Ground
Sources:
» NTSB
Follow-up / safety actions
NTSB issued 2 Safety Recommendations
Issued: 12-MAY-1999 | To: FAA | A-99-35 |
ISSUE A FLIGHT STANDARDS INFORMATION BULLETIN TO PRINCIPAL OPERATIONS INSPECTORS ASSIGNED TO 14 CODE OF FEDERAL REGULATIONS PART 135 ON-DEMAND AIR CARRIERS, INFORMING THEM OF THE CIRCUMSTANCES OF THIS ACCIDENT AND URGING THEM TO DISCUSS THE ACCIDENT WITH THEIR AIR CARRIERS AND ENCOURAGE THE USE OF THE ACCIDENT AS A PILOT TRAINING CASE STUDY, TO STRESS THE IMPORTANCE OF PILOTS\' ADHERENCE TO STANDARD OPERATING PROCEDURES. (Closed - Acceptable Action) |
Issued: 12-MAY-1999 | To: FAA | A-99-36 |
REQUIRE WITHIN 3 YEARS, THAT ALL TURBINE-POWERED AIRPLANES WITH SIX OR MORE PASSENGER SEATS THAT ARE NOT CURRENTLY REQUIRED TO BE EQUIPPED WITH A GROUND PROXIMITY WARNING SYSTEM (GPWS) HAVE AN OPERATING ENHANCED GPWS (OR TERRAIN AWARENESS AND WARNING SYSTEM). (Closed - Acceptable Action) |
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Photos
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.