# NTSB IAD02LA056: Cessna 177RG, N8200G, Trenton, NJ, May 31, 2002 - Type: NTSB accident investigation - Classification: Accident · No injuries · Limited investigation · Final report - Date: May 31, 2002, 19:50 local (23:50 UTC) - Place: Trenton, NJ - Coordinates: 40.276668, -74.813331 - Nearby events: https://openairdocs.org/map.md?lat=40.2767&lon=-74.8133&mi=10 - Phase of flight: [Initial climb](https://openairdocs.org/ntsb-phases/350) (OpenAirDocs' grouping) - Highest injury: No injuries - Injuries: 2 uninjured - Status: Completed, report September 30, 2003 - Report: Approved by Office Director - NTSB case key (mKey): 54838 - NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=IAD02LA056 - NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/54838/pdf - NTSB docket: https://data.ntsb.gov/Docket?ProjectID=54838 - Page: https://openairdocs.org/ntsb/IAD02LA056 ## Probable cause The separation of the engine induction alternate air door, which resulted in a loss of engine power. A factor was the non-compliance with the manufacturer's service letter. ## Sequence of events In NTSB's coding before 2008 (https://www.ntsb.gov/GILS/Documents/codman.pdf). - Loss of engine power, takeoff - initial climb - induction air control,alternate air/door - separation (cause) - maintenance,service bulletin/letter - not complied with, pilot in command (contributing factor) - Forced landing, descent - emergency - Overrun, emergency landing after takeoff - terrain condition - open field ## Analysis Shortly after takeoff, the airplane experienced a loss of power and the pilot attempted to land on the remaining runway. The airplane touched down at the end of the runway and came to rest in a field. Examination of the engine revealed that the plastic alternate air door had separated from the front of the induction airbox and was located in the bottom of the air intake. A service letter was issued by the airplane manufacturer in 1971 which specified that the alternate air door be moved to the rear of the induction airbox. The parts manual specified that the rear-mounted alternate air door be made out of metal. The pilot reported that he had owned the airplane for 3 years. ## Factual narrative On May 31, 2002, at 1950 eastern daylight time, a Cessna 177RG, N8200G, was substantially damaged during a forced landing shortly after takeoff from Trenton Mercer Airport (TTN), Trenton, New Jersey. The certificated commercial pilot and the passenger were not injured. Visual meteorological conditions prevailed and no flight plan was filed for the flight which was destined for Ocean City Municipal Airport (26N), Ocean City, New Jersey. The personal flight was conducted under 14 CFR Part 91. According to the pilot, on the day prior to the accident, he experienced a partial loss of manifold pressure during a flight from Groton, Connecticut, to Princeton, New Jersey. He diverted to Hartford, Connecticut, and the airplane was examined by a mechanic. The mechanic replaced the throttle control assembly on the day of the accident, and performed a run-up inspection with the pilot. The pilot departed Hartford and flew to Groton with no abnormalities noted. While at Groton, the pilot refueled the airplane with 10 gallons of fuel. He performed a preflight and run-up inspection, then departed for Trenton. The pilot landed at Trenton, and added 15-20 gallons of fuel to the airplane. He checked the fuel sumps and performed another pre-flight inspection. Again, no abnormalities were noted. About 1930, the pilot departed from runway 24 at Trenton en route to Ocean City, New Jersey. During the takeoff roll, the pilot noted that the oil temperature and pressure, manifold pressure, and rpm gauges were all "normal." Shortly after the pilot retracted the landing gear, he experienced a "near complete power loss." The sound of the engine was "much quieter," and there weren't any other unusual sounds or indications. The airplane was about 300 feet above the ground and 3/4 of the way down the runway when the engine lost power. The pilot lowered the landing gear, retarded the throttle, and attempted to land on the remaining runway. The airplane touched down at the end of the runway, traveled off the end, and came to rest in a field. A Federal Aviation Administration (FAA) inspector performed an on-scene examination of the airplane. According to the inspector, substantial damage was observed to the right wing, fuselage and landing gear. Examination of the engine revealed that the plastic alternate air door was separated from the induction airbox and located in the bottom of the air intake. The plastic air door was separated from the front of the airbox around two screws located at the 5 and 7 o'clock positions. The screws remained attached to the airbox. A test run of the engine was performed. The engine started without hesitation and ran at a low power setting for several minutes. Damage to the propeller prevented the engine from being tested at higher power settings. The airplane was manufactured in 1971. Service Letter SE71-32 was issued by Cessna Aircraft Company on October 22, 1971, which addressed the relocation of the alternate air door in the 1971 Cessna 177RG. The purpose of the relocation was to increase reliability and extend the service life of the induction airbox. In addition to the relocation of the door, compliance would also have strengthened the airbox structure. The specific changes outlined in the service letter included moving the alternate air door from the front to the rear of the airbox and incorporating a wider flange on the airbox base assembly to improve structural integrity. The service letter required that the induction airbox chamber walls be inspected for cracks "at the next major maintenance period, but no later than the next 100 hours of operation." If cracks were observed, the induction airbox was to be replaced with a new assembly that incorporated the above production improvements. If no cracks were observed, the alternate air door was to be relocated to the rear of the airbox. The Cessna 177RG Parts Manual specified that the rear-mounted alternate air door be constructed of metal. A review of the airplane's logbooks revealed no entries to indicate compliance with the service letter. The pilot reported that he had owned the airplane for 3 years. He reported 2,400 hours of total flight experience and 2,100 hours in make and model. Weather reported at Trenton, at 1853, included winds from 220 at 12 knots, gusting to 18 knots, 10 miles visibility, skies clear, temperature 27 degrees F, dew point 20 degrees F, and a barometric pressure of 29.57 inches Mercury. ## Aircraft - Registration: [N8200G](https://openairdocs.org/aircraft/N8200G), registered now, S/N 177RG0100, built 1971 (OpenAirDocs) - Reported make and model: Cessna 177RG - Registry model: [Cessna 177RG](https://openairdocs.org/model/cessna-177rg) (registry code 2073709) (OpenAirDocs) - Registry engine: [Lycoming IO-360-A1B6](https://openairdocs.org/engine/lycoming-io-360-a1b6) (registry code 41576, reciprocating) (OpenAirDocs) - Category: Airplane - Serial number: 177RG0100 - Airframe hours: 3065 - Engines: Lycoming IO-360 200 horsepower reciprocating - Damage: Substantial damage - Flight: Personal, Part 91 - Registered owner: Andrew Reaume - Airworthiness certificate: Standard, Normal - Last inspection: Annual, March 4, 2002, 61 hours before - Departed: TTN, Trenton, NJ - Destination: 26N, Ocean City, NJ - Airport: TTN, Trenton Mercer Airport, runway 24, 6,006 × 150 ft, asphalt ## Flight crew As NTSB recorded them. NTSB leaves out names. - Pilot; age 39; injuries: none; private, commercial; airplane ratings: single-engine land; instrument ratings: airplane; medical: class 3, valid medical--no waivers/lim.; seat: left; flight hours: 2,443 total, 2,143 in this make and model, 2,332 as pilot in command, 58 in the last 90 days, 32 in the last 30 days, 2 in the last 24 hours ## Weather - Conditions: Visual (VMC), Dusk - Wind: 220° at 12 knots, gusting 18 - Visibility: 10 statute miles - Lowest ceiling: none - Temperature: 81 °F, dew point 68 °F - Altimeter: 29.56 inHg - Observed at: TTN ## 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 20020531037589A](https://openairdocs.org/incident/20020531037589A), May 31, 2002: Cessna 177RG, Trenton, NJ, Substantial damage. (-23) On may 31, 2002 during take off from runway 24 at Trenton, NJ airport (ttn), after retracting the landing gear at approximately 300 feet of altitude, the… ## Docket (4 files) The files NTSB released with the investigation on July 24, 2003, on NTSB's docket system: https://data.ntsb.gov/Docket?ProjectID=54838. 1.5 MB in all. - Pilot/Operator Aircraft Accident Report, NTSB Form 6120.1 (item 1, .PDF, 1.0 MB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40442557&FileExtension=.PDF&FileName=Pilot%2FOperator%20Aircraft%20Accident%20Report,%20NTSB%20Form%206120.1-Redacted.PDF - Pilot Statement (item 2, .PDF, 97 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40442558&FileExtension=.PDF&FileName=Pilot%20Statement-Redacted.PDF - Cessna Service Bulletin (item 3, .PDF, 299 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40179920&FileExtension=.PDF&FileName=Cessna%20Service%20Bulletin-Master.PDF - Summaries of Interview (item 4, .PDF, 109 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40179921&FileExtension=.PDF&FileName=Summaries%20of%20Interview-Master.PDF 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.