# NTSB ERA22LA316: Cessna P337H, N5GY, Monongahela, PA, July 14, 2022 - Type: NTSB accident investigation - Classification: Accident · No injuries · Class 4 · Limited · Final report - Date: July 14, 2022, 15:52 local (19:52 UTC) - Place: Monongahela, PA - Coordinates: 40.209722, -79.831444 (estimated) - Nearby events: https://openairdocs.org/map.md?lat=40.2097&lon=-79.8314&mi=10 - Phase of flight: [Landing](https://openairdocs.org/ntsb-phases/550) (OpenAirDocs' grouping) - Defining event: [Landing-landing roll: Runway excursion](https://openairdocs.org/ntsb-events/300) - Highest injury: No injuries - Injuries: 1 uninjured - Status: Completed - Report: Approved by Office Director - Investigation class: Class 4 - Basic report with no Prelim publish - NTSB office: Eastern Region Aviation - Parties: FAA/FSDO - NTSB case key (mKey): 105494 - NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=ERA22LA316 - NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/105494/pdf - NTSB docket: https://data.ntsb.gov/Docket?ProjectID=105494 - Page: https://openairdocs.org/ntsb/ERA22LA316 ## Probable cause The malfunction of the braking system fluid line, which resulted in an overrun of the runway. ## Findings NTSB's coded findings; those marked are part of the probable cause. - [Landing gear system: brake](https://openairdocs.org/ntsb-findings/01023242): Aircraft › Aircraft systems · Malfunction (probable cause); cases with it: [Cessna P337H, 1 case](https://openairdocs.org/ntsb-findings/01023242/cases.md?model=2075731), [All aircraft, 297 cases](https://openairdocs.org/ntsb-findings/01023242/cases.md) ## Sequence of events The events NTSB coded, in order, by phase of flight. The defining event best describes what happened. - [Landing-landing roll: Runway excursion](https://openairdocs.org/ntsb-events/300) (defining event); cases with it: [Cessna P337H, 1 case](https://openairdocs.org/ntsb-events/300/sequence.md?model=2075731), [All aircraft, 3,643 cases](https://openairdocs.org/ntsb-events/300/sequence.md) ## Analysis According to the pilot, during the landing roll as he applied the brakes, he observed they felt “very soft.” As he continued to apply full pressure, he experienced a very low deceleration rate. He continued to pump the brakes with minimum results and executed turns to attempt to slow the airplane down. The airplane continued to roll and exited the runway before colliding with an embankment. A postaccident examination of the airplane revealed the left wing and fuselage were substantially damaged. An examination of the braking system revealed that a brake line under the floorboard was leaking hydraulic fluid. Given this information, it is likely that the degraded braking action the pilot reported during the landing was the result of the leaking brake line. ## Aircraft - Registration: [N5GY](https://openairdocs.org/deregistered/N5GY-2023-12-21), registration cancelled 2023-12-21, S/N P3370305, built 1978 (OpenAirDocs) - Reported make and model: CESSNA P337H - Registry model: [Cessna P337H](https://openairdocs.org/model/cessna-p337h) (registry code 2075731) (OpenAirDocs) - Registry engine: [Continental TSIO-360 series](https://openairdocs.org/engine/continental-tsio-360-series) (registry code 17019, reciprocating) (OpenAirDocs) - Category: Airplane - Serial number: P3370305 - Year built: 1978 - Airframe hours: 4698 - Engines: Continental TSI0-360-CB6B 225 horsepower reciprocating; Continental TSIO-360-CB5B 225 horsepower reciprocating - Damage: Substantial damage - Flight: Positioning, Part 91 - Airworthiness certificate: Standard, Normal - Last inspection: Annual, May 31, 2022, 12 hours before - Departed: TSO, Carrollton, OH - Destination: FWQ, Rostraver, PA - Airport: FWQ, Rostraver, runway 26, 4,000 × 75 ft, asphalt - Equipment: Electronic multifunction display, Handheld GPS, Stall warning system, ADS-B, Auto-pilot ## Flight crew As NTSB recorded them. NTSB leaves out names. - Pilot; age 68; injuries: none; private; airplane ratings: single-engine land, multi-engine land; instrument ratings: airplane; medical: class 3; last flight review July 14, 2022; seat: left; restraint: 3-point; flight hours: 1,259 total, 27 in this make and model, 991 as pilot in command, 15 in the last 90 days, 8 in the last 30 days, 2 in the last 24 hours ## Weather - Conditions: Visual (VMC), Day - Visibility: 10 statute miles - Lowest ceiling: 5,500 ft broken - Temperature: 79 °F, dew point 55 °F - Altimeter: 30.11 inHg - Observed at: KAGC, 10 nm away - METAR: METAR KAGC 141953Z VRB04KT 10SM BKN055 26/13 A3011 RMK AO2 SLP193 T02560133 ## 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 20220714013969A](https://openairdocs.org/incident/20220714013969A), Jul 14, 2022: Cessna P337H, Rostraver Towns, PA, Substantial damage. Following touchdown on runway 26, the pilot stated that he observed braking action was very soft. The pilot stated that he raised the aircraft nose to add… ## Docket (3 files) The files NTSB released with the investigation on October 24, 2022, on NTSB's docket system: https://data.ntsb.gov/Docket?ProjectID=105494. 2.4 MB in all. - Pilot/operator aircraft accident report, NTSB form 6120.1 (item 1, PDF, 11 pages, 2.2 MB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=14491046&FileExtension=pdf&FileName=6120%20la316_Redacted-Rel.pdf - Memorandum for record - FAA examination of airplane (item 2, PDF, 1 page, 120 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=14491204&FileExtension=pdf&FileName=The%20MOR%20FAA%20assessment%20LA316-Rel.pdf - Investigative photos (item 3, PDF, 3 pages, 119 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=14491613&FileExtension=pdf&FileName=LA316%20investigative%20photos-Rel.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.