# NTSB IAD99LA047: Nanchang CJ-6A, N4MF, Ocean City, MD, May 30, 1999 - Type: NTSB accident investigation - Classification: Accident · Serious injuries · Limited investigation · Final report - Date: May 30, 1999, 12:50 local (16:50 UTC) - Place: Ocean City, MD - Coordinates: 38.310272, -75.118107 (estimated) - Nearby events: https://openairdocs.org/map.md?lat=38.3103&lon=-75.1181&mi=10 - Phase of flight: [Standing](https://openairdocs.org/ntsb-phases/150) (OpenAirDocs' grouping) - Highest injury: Serious injuries - Injuries: 1 serious, 1 uninjured - Status: Completed, report November 2, 2000 - Report: Approved by Office Director - NTSB case key (mKey): 46432 - NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=IAD99LA047 - NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/46432/pdf - Page: https://openairdocs.org/ntsb/IAD99LA047 ## Probable cause Was the pilot leaving the magneto switch in the on position while hand rotating the propeller. ## Sequence of events In NTSB's coding before 2008 (https://www.ntsb.gov/GILS/Documents/codman.pdf). - Miscellaneous/other, standing - ignition system,ignition switch - engaged (cause) - procedures/directives - improper, pilot in command (cause) - Propeller/rotor contact to person, standing ## Analysis The pilot completed the 'before starting engines' checklist prior to departure. The flight was delayed, and the pilot became concerned about oil collecting in the lower cylinders of the radial engine, and the potential for internal damage during engine start due to hydraulic lock. He elected to clear the oil from the cylinders by hand-propping the engine. The pilot left the cockpit, and rotated the propeller by hand. The engine started instantly and threw the pilot to the ground with serious injuries. According to the pilot, examination of the cockpit after the accident revealed the magneto switch was still in the 'on' position. ## Factual narrative On May 30, 1999, about 1250 eastern daylight time, the certificated airline transport pilot/owner was seriously injured when the engine inadvertently started while hand rotating the propeller of his Nanchang CJ-6A, N4M, at the Ocean City Municipal Airport, Ocean City, Maryland. A passenger in the airplane was not injured and the airplane was not damaged. Visual meteorological conditions prevailed and no flight plan was filed. The pilot was preparing the engine for start with the intention of flight to be conducted under 14 CFR Part 91. In a written statement, the pilot said: "I had flown a local sortie out of Ocean City Airport earlier that morning. My intention was to fly a second sortie in a two-ship formation with another FAST qualified formation pilot flying his YAK-52. I had to wait approximately 35 minutes for fuel after the first sortie. We conducted a formal briefing for the formation flight and my back-seater from the earlier flight and I strapped into my airplane. I accomplished the "before starting engine" checklist and then looked over my shoulder to see if the other aircraft was ready to go." At this point the pilot aborted the engine start procedure. The pilot was concerned that oil was accumulating in the lower cylinders, and the potential of internal engine damage due to hydraulic lock during start of the radial engine. He then exited the airplane. The pilot further stated: "...as a precaution, I decided to pull the prop through to assure myself that I did not have a hydraulic lock situation. As I pulled the prop through from the 3 o'clock position to approximately the 6 or 7 o'clock position the engine fired and began running, catching me off guard and throwing me to the ground. When I aborted the start and shut down the electrical systems, I had overlooked one switch, the magneto. The magneto switch was in the "both on" position and therefore the mags were hot. All the elements were there for a successful engine start: fuel, air, and spark." The pilot reported there were no mechanical deficiencies with the airplane. He also reported a total of 11,500 flight hours which 350 flight hours were in make and model. The pilot acknowledged that all switch positions should be double checked to make sure the magnetos are not on prior to touching the propeller. ## Aircraft - Registration: [N4MF](https://openairdocs.org/aircraft/N4MF), registered now, S/N 2951203, built 1973 (OpenAirDocs) - Reported make and model: Nanchang CJ-6A - Registry model: [Nanchang China CJ-6](https://openairdocs.org/model/nanchang-china-cj-6) (registry code 05628VC) (OpenAirDocs) - Registry engine: [Amateur-built UNKNOWN ENG](https://openairdocs.org/engine/amateur-built-unknown-eng) (registry code 99999) (OpenAirDocs) - Category: Airplane - Serial number: 2951203 - Airframe hours: 2330 - Engines: China HUISAI-6 JIA 285 horsepower reciprocating - Damage: No damage - Flight: Personal, Part 91 - Registered owner: Michael J. Filucci - Airworthiness certificate: Special, Experimental (Special) - Last inspection: Annual, August 18, 1998, 177 hours before - Departed: OXB - Airport: OXB, Ocean City Municipal ## Flight crew As NTSB recorded them. NTSB leaves out names. - Pilot; age 50; flight engineer, commercial, airline transport, private; airplane ratings: multi-engine land, single-engine land; instrument ratings: airplane; medical: class 1, valid medical--w/ waivers/lim; flight hours: 11,500 total, 350 in this make and model, 8,000 as pilot in command, 275 in the last 90 days, 92 in the last 30 days, 1 in the last 24 hours ## Weather - Conditions: Visual (VMC), Day - Wind: 300° at 5 knots - Visibility: 8 statute miles - Lowest ceiling: 20,000 ft broken - Temperature: 88 °F, dew point 66 °F - Altimeter: 30.00 inHg - Observed at: SBY, 18 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 19990530044729A](https://openairdocs.org/incident/19990530044729A), May 30, 1999: Nancng CJ6, Ocean City, MD, No damage. (-23) During pre-flight the engine started when the prop. Was moved checking for a hydraulic lock. The prop. Struck the pilot in the right side resulting in… 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.