Cessna 320 N4198T
28 May 1993 · Anchorage, Alaska, United States · No injuries
Summary
On 28 May 1993 at about 22:10 local time, a Cessna 320 registered N4198T, operated by Aeromap US Inc, was involved in an accident near Anchorage, Alaska, United States. One person was on board and nobody was injured. The aircraft was substantially damaged. The NTSB has published a probable cause for this accident; it is quoted in full below.
The record
- Date
- at 22:10
- Classification
- Accident
- Location
- Anchorage, Alaska, United States
- Nearest airport
- Merrill Field (MRI)
- Coordinates
- 61.1807, -149.8806
- Aircraft
- Cessna 320
- Registration
- N4198T
- Category
- Airplane
- Engines
- 2
- Operator
- Aeromap US Inc
- Operating rule
- Part 91: General Aviation
- Purpose of flight
- Business
- Phase of flight
- Not recorded
- Aircraft damage
- Substantial
- Weather
- VMC
- Light
- Day
- NTSB number
- ANC93FA070
People
Nobody was injured.
| On board | Died | Serious | Minor | Uninjured |
|---|---|---|---|---|
| 1 | 0 | 0 | 0 | 1 |
Probable cause
AN UNDETERMINED FAILURE THAT RESULTED IN AN OVERVOLTAGE CONDITION OF THE ELECTRICAL SYSTEM, OVERHEATING OF THE BATTERY, OVERDRIVE (OVERTORQUE) OF THE LANDING GEAR EXTENSION SYSTEM, A DISCONNECT OF THE EMERGENCY EXTENSION SYSTEM, AND A SUSBSEQUENT COLLAPSE OF THE MAIN GEAR WHEN IT COULD NOT BE LOCKED IN THE EXTENDED POSITION.
Quoted verbatim from the NTSB record. This site does not paraphrase or interpret it.
Read the full NTSB narrative
THE PILOT SAID THAT DURING FLIGHT, HE ENCOUNTERED AN OVERVOLTAGE CONDITION & TURNED OFF THE ELECTRICAL MASTER SWITCH. HE NOTED THAT THE VHF RADIO CIRCUIT BREAKER HAD TRIPPED & THE TURN & BANK INDICATOR SMOKED. HE SAID THAT ABOUT 10 MILES FROM THE AIRPORT, HE TURNED THE MASTER SWITH BACK ON & TRIED TO RESET THE CIRCUIT BREAKER, BUT AGAIN HE NOTED SMOKE IN THE COCKPIT. HE SAID THE LANDING GEAR EXTENDED VERY FAST & HARD, BUT IT DID NOT LOCK. WHEN HE ATTEMPTED TO FOLLOW THE EMERGENCY GEAR EXTENSION PROCEDURE, THE CRANK DID NOT WORK. THE MAIN GEAR COLLAPSED DURING LANDING. AN EXAM OF THE ELECTRICAL SYSTEM DISCLOSED A CHARRED & EXPANDED BATTERY. THE DOWN LIMIT SWITCH FOR THE LANDING GEAR MOTOR HAD BROKEN FROM ITS MOUNT BY THE UPPER BELL CRANK TRAVELING BEYOND THE DOWN LIMIT; A TEARDOWN OF THE LANDING GEAR ACTUATOR ASSEMBLY DISCLOSED EVIDENCE OF OVERTRAVEL. THE ALTERNATORS, VOLTAGE REGULATORS & OVER VOLTAGE RELAY ALL TESTED WITHIN ALLOWABLE LIMITS.
Quoted verbatim from the NTSB record.
Other Cessna 320 accidents
| Date | Aircraft | Location | Operator | Outcome | Died |
|---|---|---|---|---|---|
| 17 Apr 1993 | Cessna 320 | Mesa, Arizona, United States | John T. Rooney | No injuries | - |
| 21 Apr 1993 | Cessna 320C | No. Little Rock, Arkansas, United States | Sky Trader Inc. | No injuries | - |
| 30 Oct 1993 | Cessna 320C | Spirit Lake, Idaho, United States | Chapman, E.l. | No injuries | - |
| 9 Feb 1994 | Cessna 320F | Goshen, Indiana, United States | - | Fatal | 1 |
| 28 Aug 1994 | Cessna 320B | Hood River, Oregon, United States | Knoll, Ronald K. | Serious injuries | - |
| 18 Jun 1992 | Cessna 320D | Aztec, New Mexico, United States | Dabbs, Thurman C. | No injuries | - |
Other accidents in this area
| Date | Aircraft | Location | Operator | Outcome | Died |
|---|---|---|---|---|---|
| 21 Jul 1993 | Cessna A185F | Denali Nat'l Pk, Alaska, United States | James Okonek | Serious injuries | - |
| 4 Aug 1993 | Piper PA-32R-300 | Atigun Pass, Alaska, United States | Yutana Airlines | Fatal | 1 |
| 19 Aug 1993 | De Havilland DHC-3 | Nikabuna Lake, Alaska, United States | Ketchum Air Service Inc. | Minor injuries | - |
| 31 Aug 1993 | De Havilland DHC-2 | Iliamna, Alaska, United States | Rainbow King, Inc | Fatal | 3 |
| 2 Sep 1993 | Piper PA-18A-150 | Sanona Creek, Alaska, United States | Garfield, Wade E. | Fatal | 2 |
| 8 Sep 1993 | Interstate S-1B2 ARCTIC TERN | Talkeetna River, Alaska, United States | Franklin, Gary L. | Serious injuries | - |