# NTSB MIA95LA056: Mooney 20J, N205MD, St. Petersburg, FL, January 8, 1995 - Type: NTSB accident investigation - Classification: Accident · Minor injuries · Limited investigation · Final report - Date: January 8, 1995, 16:53 local (21:53 UTC) - Place: St. Petersburg, FL - Location: 27.7709° N, 82.6793° W: Placed by OpenAirDocs: center of St. Petersburg, FL, within about 6 miles (OpenAirDocs) - Nearby events: https://openairdocs.org/map.md?lat=27.7709&lon=-82.6793&mi=10 - Phase of flight: [Enroute](https://openairdocs.org/ntsb-phases/400) (OpenAirDocs' grouping) - Highest injury: Minor injuries - Injuries: 3 minor - Status: Completed, report August 23, 1995 - Report: Approved by Office Director - NTSB case key (mKey): 37721 - NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=MIA95LA056 - NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/37721/pdf - Page: https://openairdocs.org/ntsb/MIA95LA056 ## Probable cause The failure of the No. 3 connecting rod bolt due to oil starvation for undetermined reasons. This resulted in a total loss of engine power, forced landing, and subsequent ditching. ## Sequence of events In NTSB's coding before 2008 (https://www.ntsb.gov/GILS/Documents/codman.pdf). - Loss of engine power(total) - mech failure/malf, cruise - engine assembly,connecting rod bolt - failure,total - fluid,oil - starvation - fluid,oil - undetermined (cause) - Forced landing, emergency descent/landing - Ditching, emergency descent/landing ## Analysis The pilot stated he took off over the bay, climbed to 1,000 feet msl and leveled off. The engine was running rough and the oil pressure was decreasing. He notified the control tower he was returning to the airport. When he decreased power, the engine started to shake violently. A forced landing was made into a bay. The airplane was recovered and the engine was examined by the manufacturer in the presence of the FAA. Disassembly of the engine revealed a separation of the No. 3 connecting rod cap and bolts. Further examination of the components by the NTSB laboratory revealed a failure of the No. 3 connecting rod bolt due to oil starvation for undetermined reasons. ## Factual narrative On January 8, 1995, about 1653 eastern standard time, a Mooney 20J, N205MD, registered to Steven Miller, operating as a 14 CFR Part 91 personal flight, experienced a loss of oil pressure in cruise flight, and made a forced landing into Tampa Bay. Visual meteorological conditions prevailed and no flight plan was filed for the local flight. The airplane sustained substantial damage and the private pilot and two passengers reported minor injuries. The flight originated from St. Petersburg, Florida, about 4 minutes before the accident. The pilot stated he taxied the airplane to a fixed-base operator for fuel, and completed a preflight inspection of the airplane. When checking the oil, he noticed the oil cap was crossthreaded. The dip stick indicated close to 8 quarts of oil. He taxied to runway 35 and was cleared for takeoff. On climb out the control tower informed him that the airplane was trailing smoke. He informed the tower that the airplane had just had an oil change, and that it should burn off. When he leveled the airplane at 1,000 feet msl, the engine was running rough, and the oil pressure was decreasing. He informed St. Petersburg tower of the situation and informed them that he was returning to the airport. The tower asked if he required any assistance, and cleared him to land. When he reduced power, the engine began to shake violently, and a forced landing was made into Tampa Bay. Examination of the engine assembly and accessories was conducted by personnel from Textron Lycoming in the presence of the FAA. Disassembly of the engine revealed a separation of the No. 3 rod cap and rod bolts. The crankshaft rod bearing journal exhibited black discoloration and the rod bearings were extruded. The components were forwarded to the NTSB Materials Laboratory for analysis. (For additional information see, Textron Lycoming Accident Investigation Report). Examination of the No. 3 connecting rod bolts revealed they had separated in two pieces. The pieces contained bending and necking down deformation and a rough fracture surface, typical of an overstress bending separation. The crankshaft ends of the connecting rods, the connecting rod journals, and the nearby portions of the crankcheeks were darkly discolored as if severely overheated. (For additional information see, NTSB Metallurgist's Factual Report No. 95-100). The components were released to Mr. Les Waters, on May 22, 1995. ## Aircraft - Registration: [N205MD](https://openairdocs.org/deregistered/N205MD-2022-07-12), registration cancelled 2022-07-12, S/N 24-3013 (OpenAirDocs) - Reported make and model: MOONEY 20J - Registry model: [Mooney M20J](https://openairdocs.org/model/mooney-m20j) (registry code 5870219) (OpenAirDocs) - Registry engine: [Lycoming I0360 SER A&C](https://openairdocs.org/engine/lycoming-i0360-ser-a-c) (registry code 41511, reciprocating) (OpenAirDocs) - Category: Airplane - Serial number: 24-3013 - Airframe hours: 1420 - Engines: LYCOMING IO-360-A3B6D 200 horsepower reciprocating - Damage: Substantial damage - Flight: Personal, Part 91 - Registered owner: Miller, Steven - Airworthiness certificate: Standard, Normal - Last inspection: Annual, October 2, 1994, 36 hours before - Departed: PIE ## Flight crew As NTSB recorded them. NTSB leaves out names. - Pilot; age 33; private; airplane ratings: single-engine land; medical: class 3, valid medical--w/ waivers/lim; seat: left; flight hours: 669 total, 574 in this make and model, 603 as pilot in command, 35 in the last 90 days, 16 in the last 30 days, 1 in the last 24 hours ## Weather - Conditions: Visual (VMC), Day - Wind: 330° at 9 knots - Visibility: 10 statute miles - Lowest ceiling: 25,000 ft broken - Temperature: 55 °F, dew point 45 °F - Altimeter: 30.00 inHg - Observed at: PIE, 4 nm away ## 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 19950108001309A](https://openairdocs.org/incident/19950108001309A), Jan 8, 1995: Mooney M20J, St Petersburg, FL, Substantial damage. Lost oil pressure. Ditched in tampa bay. Noted. Oil stick cross thread prior flight. Lost oil. Engine siezed. 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.