# NTSB ATL99LA029: Cessna 150B, N5957T, Adjuntas, PR, December 5, 1998 - Type: NTSB accident investigation - Classification: Accident · No injuries · Limited investigation · Final report - Date: December 5, 1998, 14:00 local (19:00 UTC) - Place: Adjuntas, PR - Phase of flight: [Initial climb](https://openairdocs.org/ntsb-phases/350) (OpenAirDocs' grouping) - Highest injury: No injuries - Injuries: 1 uninjured - Status: Completed, report July 26, 2001 - Report: Approved by Office Director - NTSB case key (mKey): 45405 - NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=ATL99LA029 - NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/45405/pdf - Page: https://openairdocs.org/ntsb/ATL99LA029 ## Probable cause The loss of engine power due to the restricted movement of the intake and exhaust valves on number 3 cylinder. ## Sequence of events In NTSB's coding before 2008 (https://www.ntsb.gov/GILS/Documents/codman.pdf). - Loss of engine power, takeoff - initial climb - engine assembly,valve,exhaust - movement restricted (cause) - engine assembly,valve,intake - movement restricted (cause) - weather condition - carburetor icing conditions - Forced landing, descent - emergency - In flight collision with object, emergency descent/landing - object - ground ## Analysis During the initial climb after takeoff the engine lost power. The pilot elected to return to the airport for an emergency landing. The pilot was forced to land in a grassy area short of the airport. The engine examination disclosed that the number three cylinder had no compression and no intake or exhaust valve movement was noted when the engine was rotated though. . ## Factual narrative On December 5, 1998, at 1400 eastern standard time, a Cessna 150B, N5957T, collided with the ground during an attempted emergency landing at a private sod airstrip near Adjuntas, Puerto Rico. The personal flight was operated by the pilot under provisions of Title 14 CFR Part 91 and visual flight rules. Visual weather conditions prevailed at the time of the accident with no flight plan filed. The airplane sustained substantial airframe damage, and the private pilot was not injured. The accident occurred during the initial climb after takeoff from Adjuntas, Puerto Rico, at 1355. The pilot in the Cessna 150B and two other men in the Cessna 172, departed Adjuntas, Puerto Rico enroute to Arecibo, Puerto Rico. According to the pilot of the Cessna 150B, both airplanes were inspected for oil and fuel during the preflight. The pilot stated that, during the initial climb after takeoff, the engine lost power and flight could not be maintained. The pilot elected to return to the airport for an emergency landing. The pilot was forced to land in a grassy area short of the runway. The engine examination disclosed that the number three cylinder had no compression. The examination also disclosed that no intake or exhaust valve movement was noted when the engine was rotated though. Weather conditions were favorable for the formation of carburetor icing conditions. ## Aircraft - Registration: [N5957T](https://openairdocs.org/deregistered/N5957T-2014-10-29), registration cancelled 2014-10-29, S/N 15060657, built 1964 (OpenAirDocs) - Reported make and model: Cessna 150B - Registry model: [Cessna 150D](https://openairdocs.org/model/cessna-150d) (registry code 2071810) (OpenAirDocs) - Registry engine: [Continental 0-200 series](https://openairdocs.org/engine/continental-0-200-series) (registry code 17020, reciprocating) (OpenAirDocs) - Category: Airplane - Serial number: 15060657 - Airframe hours: 3890 - Engines: Continental O-200-A 100 horsepower reciprocating - Damage: Substantial damage - Flight: Personal, Part 91 - Operator: Ruben Espada - Registered owner: Gill Mercado - Airworthiness certificate: Standard, Utility - Last inspection: Annual, October 6, 1998, 6 hours before - Departed: ADJUNTAS, PR - Destination: ABO, ARECIBO, PR - Airport: Adjuntas, runway 12, 1,600 × ft, asphalt ## Flight crew As NTSB recorded them. NTSB leaves out names. - Pilot; age 51; private; airplane ratings: single-engine land; medical: class 2, valid medical--w/ waivers/lim; seat: left; flight hours: 2,553 total, 1,800 in this make and model, 2,459 as pilot in command, 28 in the last 90 days, 15 in the last 30 days ## Weather - Conditions: Visual (VMC), Day - Wind: 240° at 4 knots - Visibility: 10 statute miles - Lowest ceiling: 2,000 ft overcast - Temperature: 84 °F, dew point 70 °F - Altimeter: 29.00 inHg - Observed at: SJU, 43 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 19981205046969A](https://openairdocs.org/incident/19981205046969A), Dec 5, 1998: Cessna 150D, Adjuntas, No damage. (-23) On December 5, 1998, at 1400 EST, a Cessna 150-D N5957T, collided with the ground during an attempted emergency landing at a private sod airstrip near… ## Other investigations on N5957T (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 MIA67D0309](https://openairdocs.org/ntsb/MIA67D0309), Nov 7, 1966: Cessna 150 (N5957T), Homestead, FL, 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.