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NTSB Report
July 8, 1990 · Cessna 404 · N6239G
San Angelo, TX
Overview
Report Status
Probable Cause
Event Type
Accident
Date
July 8, 1990
Injury Outcomes
3 injuries (3 minor injuries)
Location
San Angelo, TX
Aircraft
Cessna 404
Tail Number
N6239G
Operator
U S Customs
Injuries
Minor
Aircraft Damage
Substantial
NTSB Number
FTW90GA137
FM 9500' MSL AT 35 DME, COPLT (SIC) BGN (HOODED TYPE) ILS RWY 3 APCH WITH 14 TO 22 KT TAILWIND. HE PLANNED NOT TO EXCEED 500'/MIN RATE OF DSCNT TO AVOID SUPERCOOLING ENGS. PIC RPRTD ACFT WAS OFF COURSE & ABT 1500' HI AS IT APCHD OM. HE TOOK CTL & MNVRD ACFT ON COURSE & GP, THEN RTRND CTL TO SIC TO CONT ILS. DRG MNVR, 2500'/MIN DSCNT OCCURRED; SPD INCRD 31 KT. AS APCH CONTD, PIC EXTDD GEAR & FLAPS. AS ACFT SLOWED & BGN SETTLING, SIC ADVND THROTTLES, BUT ENGS DIDN'T RESPOND. PIC TOOK CTL & BOTH PLTS MANIPULATED ENG CTLS, BUT PWR WASN'T RESTORED. RECALLATIONS DIFFERED; NEITHER PLT COULD RECALL ENG INST INDCNS. GEAR COLLAPSED AS ACFT CTCD GND SHORT OF RWY & SLID THRU FENCE. MIX CTLS WERE FND ABT 4 TO 5 'CLICKS' AFT OF FULL FWD PSN, THROTTLES FND AT ABT 3/4 FWD PSN; ABT 80 GAL OF FUEL FND IN WING TANKS. INV REVEALED SERIES OF MAINT WRITE-UPS NOTING ENGS HAD RUN RICH & ROUGH, BUT NO PRE-ACDNT PART FAILURE OR MALFUNCTION WAS FND. ENGS OPNLY CHECKED OK. REAR SEAT PAX THOUGHT PIC PULLED PROP CTLS 'DOWN' & BACK FWD. GND WITNESS RPRTD SOUND AS IF 'PROP REVERSERS REVVED UP.'
NTSB Probable Cause
IMPROPER USE OF POWERPLANT CONTROLS BY THE PILOT-IN-COMMAND (PIC). FACTORS RELATED TO THE ACCIDENT WERE: THE PIC'S INADEQUATE CREW COORDINATION, AND THE EXCESSIVE AIRSPEED AND RATE OF DESCENT THAT RESULTED, WHEN THE PIC MANEUVERED THE AIRCRAFT BACK ON COURSE AND GLIDE PATH.
Full Narrative
FM 9500' MSL AT 35 DME, COPLT (SIC) BGN (HOODED TYPE) ILS RWY 3 APCH WITH 14 TO 22 KT TAILWIND. HE PLANNED NOT TO EXCEED500'/MIN RATE OF DSCNT TO AVOID SUPERCOOLING ENGS. PIC RPRTD ACFT WAS OFF COURSE & ABT 1500' HI AS IT APCHD OM. HE TOOK CTL & MNVRD ACFT ON COURSE & GP, THEN RTRND CTL TO SIC TO CONT ILS. DRG MNVR, 2500'/MIN DSCNT OCCURRED; SPD INCRD 31 KT.AS APCH CONTD, PIC EXTDD GEAR & FLAPS. AS ACFT SLOWED & BGN SETTLING, SIC ADVND THROTTLES, BUT ENGS DIDN'T RESPOND. PIC TOOK CTL & BOTH PLTS MANIPULATED ENG CTLS, BUT PWR WASN'T RESTORED. RECALLATIONS DIFFERED; NEITHER PLT COULD RECALL ENG INST INDCNS. GEAR COLLAPSED AS ACFT CTCD GND SHORT OF RWY & SLID THRU FENCE. MIX CTLS WERE FND ABT 4 TO 5 'CLICKS' AFT OF FULL FWD PSN, THROTTLES FND AT ABT 3/4 FWD PSN; ABT 80 GAL OF FUEL FND IN WING TANKS. INV REVEALED SERIES OF MAINT WRITE-UPS NOTING ENGS HAD RUN RICH & ROUGH, BUT NO PRE-ACDNT PART FAILURE OR MALFUNCTION WAS FND. ENGS OPNLY CHECKED OK.REAR SEAT PAX THOUGHT PIC PULLED PROP CTLS 'DOWN' & BACK FWD. GND WITNESS RPRTD SOUND AS IF 'PROP REVERSERS REVVED UP.'
Flight
Event TypeAccident
Event Time12:36 CDT
Nearest AirportMathis Field (0nm N)
Runway3
Runway Length5939 ft
Runway Width150 ft
Flight Plan FiledCvfr
Aircraft FireNo
Aircraft ExplosionNo
Aircraft
AircraftCessna 404
Tail NumberN6239G
Aircraft CategoryAir
DamageSubstantial
OperatorU S Customs
Operating RulePart 91
Engines2
Engine TypeReciprocating
Engine DetailsContinental · GTSIO-520-M2 · Reciprocating · 375
Seats8
People & Injuries
Injury Summary3 injuries (3 minor injuries)
Fatal0
Serious0
Minor3
Uninjured0
Total3
Crew 1Age 33 · First Class
Conditions
ConditionsVMC
LightDaylight
Wind180° @ 16 kt, gusting 24 kt
Visibility20 sm
CeilingBroken clouds 4600 ft
Temperature / Dew Point63 F
Altimeter30.00 inHg
Observation Time15:52
Weather SourceWFAC