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NTSB Report
November 15, 1992 · Beech 1900C · N317BH
Denver, CO
Overview
Report Status
Probable Cause
Event Type
Accident
Date
November 15, 1992
Injury Outcomes
No injuries (18 uninjured)
Location
Denver, CO
Aircraft
Beech 1900C
Tail Number
N317BH
Operator
Britt Airways
Injuries
None
Aircraft Damage
Substantial
NTSB Number
DEN93LA011
AFTER STARTING THE NO. 2 ENGINE, THE CAPTAIN SIGNALLED THE RAMP AGENT TO DISCONNECT THE GROUND POWER UNIT (GPU). THE AGENT SIGNALLED THE CAPTAIN THE GPU HAD BEEN DISCONNECTED AND THE CAPTAIN VERIFIED THIS BY OBSERVING THE 'EXT PWR' ANNUNCIATOR LIGHT HAD EXTINGUISHED AND THERE WAS NO VOLTAGE TO THE EXTERNAL POWER SELECTOR ON THE VOLTMETER. AFTER STARTING THE NO. 1 ENGINE, THE CAPTAIN SIGNALLED THE RAMP AGENT HE WAS READY TO TAXI. THE AGENT GAVE AN ALL CLEAR SIGNAL AND DIRECTED HIM TO MAKE A HARD RIGHT TURN. AS THE AIRPLANE WAS PIVOTING RIGHT, THE AFT PORTION OF THE AIRPLANE STRUCK THE GPU, RUPTURING THE PRESSURE VESSEL. THE CAPTAIN SAID THE DISCONNECTED GPU WAS NOT VISIBLE FROM THE COCKPIT.
NTSB Probable Cause
THE RAMP AGENT MISJUDGING THE CLEARANCE BETWEEN THE AIRPLANE AND GPU. A FACTOR WAS: UNAVAILABILITY OF PROPER GROUND ASSISTANCE.
Full Narrative
AFTER STARTING THE NO. 2 ENGINE, THE CAPTAIN SIGNALLED THE RAMP AGENT TO DISCONNECT THE GROUND POWER UNIT (GPU). THE AGENT SIGNALLED THE CAPTAIN THE GPU HAD BEEN DISCONNECTED AND THE CAPTAIN VERIFIED THIS BY OBSERVING THE 'EXT PWR' ANNUNCIATOR LIGHT HAD EXTINGUISHED AND THERE WAS NO VOLTAGE TO THE EXTERNAL POWER SELECTOR ON THE VOLTMETER. AFTER STARTING THE NO. 1 ENGINE, THE CAPTAIN SIGNALLED THE RAMP AGENT HE WAS READY TO TAXI. THE AGENT GAVE AN ALL CLEAR SIGNAL AND DIRECTED HIM TO MAKE A HARD RIGHT TURN. AS THE AIRPLANE WAS PIVOTING RIGHT, THE AFT PORTION OF THE AIRPLANE STRUCK THE GPU, RUPTURING THE PRESSURE VESSEL. THE CAPTAIN SAID THE DISCONNECTED GPU WAS NOT VISIBLE FROM THE COCKPIT.
Flight
Event TypeAccident
Event Time11:40 MST
Nearest AirportStapleton Int'L (0nm)
Runway0
Flight Plan FiledIFR
Aircraft FireNo
Aircraft ExplosionNo
Aircraft
AircraftBeech 1900C
Tail NumberN317BH
Aircraft CategoryAir
DamageSubstantial
OperatorBritt Airways
Operating RulePart 135
Engines2
Engine TypeTurboprop
Engine DetailsP&W · PT6A-65B · Turboprop · 1100
Seats21
People & Injuries
Injury SummaryNo injuries (18 uninjured)
Fatal0
Serious0
Minor0
Uninjured18
Total18
Crew 1Age 36 · First Class
Conditions
ConditionsVMC
LightDaylight
Wind210° @ 5 kt
Visibility70 sm
CeilingBroken clouds 16000 ft
Temperature / Dew Point61 F / 16 C
Altimeter30.00 inHg
Weather SourceWIT