# NTSB SEA90LA004: Cessna 310C, N1845H, Redmond, OR, October 9, 1989 - Type: NTSB accident investigation - Classification: Accident · No injuries · Limited investigation · Final report - Date: October 9, 1989, 13:33 local (20:33 UTC) - Place: Redmond, OR - Coordinates: 44.260887, -121.220794 (estimated) - Nearby events: https://openairdocs.org/map.md?lat=44.2609&lon=-121.2208&mi=10 - Phase of flight: [Enroute](https://openairdocs.org/ntsb-phases/400) (OpenAirDocs' grouping) - Highest injury: No injuries - Injuries: 4 uninjured - Status: Completed, report June 25, 1992 - Report: Approved by Office Director - NTSB case key (mKey): 41137 - NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=SEA90LA004 - NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/41137/pdf - Page: https://openairdocs.org/ntsb/SEA90LA004 ## Probable cause POOR INFLIGHT PLANNING, AND THE PILOT DID NOT MAINTAIN A PROPER GLIDE PATH ON FINAL APPROACH, NOR PERFORM PROPER CORRECTIVE ACTION. FACTORS RELATED TO THE ACCIDENT WERE: THE PILOT'S ATTENTION WAS DIVERTED DUE TO AN OPEN CABIN DOOR AND THE PARTIAL LOSS OF ENGINE POWER. ## Sequence of events In NTSB's coding before 2008 (https://www.ntsb.gov/GILS/Documents/codman.pdf). - Miscellaneous/other, cruise - normal - door,passenger - not secured (contributing factor) - Loss of engine power(partial) - nonmechanical, approach - vfr pattern - final approach - In flight collision with terrain/water, approach - vfr pattern - final approach - proper glidepath - not maintained, pilot in command (cause) - diverted attention, pilot in command (contributing factor) - remedial action - not performed, pilot in command (cause) - in-flight planning/decision - poor, pilot in command (cause) ## Analysis TWENTY MIN AFTER DEPT, THE PLT REPORTED THAT THE TOP LATCH TO THE MAIN CABIN DOOR OPENED. AN ATTEMPT TO CLOSE THE DOOR WAS UNSUCCESSFUL. THE PLT OPTED TO CONTINUE THE FLT. SEVERAL MIN PASSED WHEN THE LOWER LATCH OPENED. THE AIRPLANE YAWED TO THE RT WITH A TREMENDOUS BUFFETING. THE PLT DIVERTED TO THE NEAREST ARPT. WHILE ON AN EXTENDED DOWNWIND TO THE RWY TO REDUCE ALT, THE PLT REPORTED THAT THE RT ENGINE LOST PWR MOMENTARILY. THE PLT COULD NOT IDENTIFY A PROBLEM AND CONTINUED THE APPROACH. WHILE ON FINAL APPROACH STILL ABOVE THE GLIDE SLOPE, THE PLT REPORTED THAT AN ENG QUIT. THE PLT COULD NOT IDENTIFY WHICH ENG. THE PLT LOOKED DOWN AND SCANNED THE INSTRUMENT PANEL TO ISOLATE THE PROBLEM. WHEN HE LOOKED BACK UP, THE PLANE WAS ON SHORT FINAL AND BELOW THE GLIDE SLOPE. THE AIRPLANE THEN COLLIDED WITH THE TERRAIN SHORT OF THE RWY. AN ENG TEST RUN WAS PERFORMED ON BOTH ENG. BOTH ENG WERE FOUND TO RUN AT VARYING PWR SETTINGS FOR SEVERAL MINUTES. ## Aircraft - Registration: [N1845H](https://openairdocs.org/deregistered/N1845H-2013-07-08), registration cancelled 2013-07-08, S/N 35945, built 1959 (OpenAirDocs) - Reported make and model: CESSNA 310C - Registry model: [Cessna 310C](https://openairdocs.org/model/cessna-310c) (registry code 2074210) (OpenAirDocs) - Registry engine: [Continental I0-470 series](https://openairdocs.org/engine/continental-i0-470-series) (registry code 17027, reciprocating) (OpenAirDocs) - Category: Airplane - Serial number: 35945 - Airframe hours: 4333 - Engines: CONTINENTAL IO-470-D 260 horsepower reciprocating - Damage: Substantial damage - Fire: On-Ground - Flight: Personal, Part 91 - Registered owner: Inlow, Ken & Skultety, Ed - Airworthiness certificate: Standard, Normal - Last inspection: Annual, November 23, 1988, 40 hours before - Departed: S22, HERMISTON, OR - Destination: STS, SANTA ROSA, CA - Airport: RDM, Roberts, runway 10, 7,000 × 150 ft, dirt ## Flight crew As NTSB recorded them. NTSB leaves out names. - Pilot; age 48; commercial; airplane ratings: multi-engine land, single-engine land; instrument ratings: airplane; medical: class 2, valid medical--w/ waivers/lim; seat: left; flight hours: 948 total, 13 in this make and model, 812 as pilot in command, 13 in the last 90 days, 9 in the last 30 days, 1 in the last 24 hours ## Weather - Conditions: Visual (VMC), Day - Wind: calm - Visibility: 45 statute miles - Lowest ceiling: none - Temperature: 81 °F, dew point 39 °F - Altimeter: 30.00 inHg - Observed at: RDM ## FAA reports on this event (1) The FAA's own accident and incident reports, matched to the aircraft by N-number and date (OpenAirDocs). - [Accident 19891009039289A](https://openairdocs.org/incident/19891009039289A), Oct 9, 1989: Cessna 310C, Redmond, OR, Substantial damage. Cabin door not secured opened in flight. Diverted lost engine on final landed short. Aux tanks empty. ## Other investigations on N1845H (1) From the NTSB's public API. Aircraft are matched to registry aircraft by N-number and event date, checked against the reported serial number, make and model; the registry's history has gaps, so older matches can be wrong. Compare the reported make and model. - [NTSB CHI74FET06](https://openairdocs.org/ntsb/CHI74FET06), Aug 18, 1973: Cessna 310C (N1845H), Griffith, IN, substantial damage From the NTSB's public API. Aircraft are matched to registry aircraft by N-number and event date, checked against the reported serial number, make and model; the registry's history has gaps, so older matches can be wrong. Compare the reported make and model. --- OpenAirDocs.org is an independent research project of [Contrail Labs](https://contraillabs.com/). It is not affiliated with the FAA or the NTSB. Source documents are U.S. government works in the public domain.