# NTSB CEN22LA225: Piper PA-22-160, N8926D, Roanoke, TX, May 27, 2022 - Type: NTSB accident investigation - Classification: Accident · No injuries · Class 4 · Limited · Final report - Date: May 27, 2022, 09:40 local (14:40 UTC) - Place: Roanoke, TX - Coordinates: 33.004, -97.2258 (estimated) - Nearby events: https://openairdocs.org/map.md?lat=33.0040&lon=-97.2258&mi=10 - Phase of flight: [Landing](https://openairdocs.org/ntsb-phases/550) (OpenAirDocs' grouping) - Defining event: [Landing-landing roll: Sys/Comp malf/fail (non-power)](https://openairdocs.org/ntsb-events/330) - Highest injury: No injuries - Injuries: 2 uninjured - Status: Completed - Report: Approved by Office Director - Investigation class: Class 4 - Basic report with no Prelim publish - NTSB office: Central Region - Parties: FAA NTX FSDO - NTSB case key (mKey): 105187 - NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=CEN22LA225 - NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/105187/pdf - NTSB docket: https://data.ntsb.gov/Docket?ProjectID=105187 - Page: https://openairdocs.org/ntsb/CEN22LA225 ## Probable cause Inadequate maintenance of the airplane’s brake system that resulted in a hole in the brake line, the loss of brake fluid, and the subsequent loss of brake functionality. ## Findings NTSB's coded findings; those marked are part of the probable cause. - [Misc hardware: hoses and tubes](https://openairdocs.org/ntsb-findings/01071410): Aircraft › Fluids/misc hardware · Not serviced/maintained (probable cause); cases with it: [Piper PA-22-160, 1 case](https://openairdocs.org/ntsb-findings/01071410/cases.md?model=7102214), [All aircraft, 40 cases](https://openairdocs.org/ntsb-findings/01071410/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: Sys/Comp malf/fail (non-power)](https://openairdocs.org/ntsb-events/330) (defining event); cases with it: [Piper PA-22-160, 3 cases](https://openairdocs.org/ntsb-events/330/sequence.md?model=7102214), [All aircraft, 994 cases](https://openairdocs.org/ntsb-events/330/sequence.md) ## Analysis The pilot reported that he was conducting a local pattern flight and performing touch and goes when during his second landing when he applied the brakes to slow down, the brakes did not respond. The pilot used the emergency break handle to stop but got no response. The pilot then steered the airplane into the grass adjacent to the runway to slow down. During the excursion, the left main landing gear struck a hole in the grass causing the aircraft to stop abruptly and nose over coming to rest inverted. The airplane sustained substantial damage to the forward fuselage and wings. A postaccident examination of the airplane revealed a small hole in left brake line and the line in that area was chaffed. The line transitioned from the airplane fuselage to the landing gear and brakes through a jagged hole in a metal support bulkhead. The hole did not possess a barrier or material to prevent rubbing of the break line. A review of the airplane’s maintenance logs did not show any entries regarding the brakes or any damage to the left brake line area. It is likely that the hole in the brake line existed for some time before it leaked enough fluid to cause the brakes to malfunction during the accident flight. According to a manufacturer’s engineering diagram, there should have been a grommet installed (Part Number: AN331-6-10) in the bulkhead hole that the brake line passed through. The part was designed to protect the brake line from chaffing. The pilot reported that there were no indications of a brake issue when he did his preflight. ## Aircraft - Registration: [N8926D](https://openairdocs.org/aircraft/N8926D), registered now, S/N 22-6083, built 1958 (OpenAirDocs) - Reported make and model: PIPER PA-22-160 - Registry model: [Piper PA-22-160](https://openairdocs.org/model/piper-pa-22-160) (registry code 7102214) (OpenAirDocs) - Registry engine: [Lycoming 0-320 series](https://openairdocs.org/engine/lycoming-0-320-series) (registry code 41508, reciprocating) (OpenAirDocs) - Category: Airplane - Serial number: 22-6083 - Year built: 1958 - Airframe hours: 2000 - Engines: Lycoming O-320-B2A 180 horsepower reciprocating - Damage: Substantial damage - Flight: Personal, Part 91 - Operator: Hashley Gary L - Registered owner: Hashley Gary L - Airworthiness certificate: Standard, Normal - Last inspection: Annual, February 1, 2022 - Departed: MWL, Mineral Wells, TX - Destination: Same as departure - Airport: 52F, Northwest Regional, runway 17, 3,500 × 75 ft, asphalt - Equipment: Stall warning system, ADS-B ## Flight crew As NTSB recorded them. NTSB leaves out names. - Pilot; age 59; injuries: none; airline transport, commercial, flight instructor; airplane ratings: multi-engine land, single-engine land; instrument ratings: airplane; medical: class 1, without waivers/limitations; last flight review February 1, 2022; seat: left; restraint: 3-point; flight hours: 11,300 total, 200 in this make and model, 30 in the last 90 days, 5 in the last 30 days, 1 in the last 24 hours ## Weather - Conditions: Visual (VMC), Day - Visibility: 10 statute miles - Lowest ceiling: none - Temperature: 82 °F, dew point 45 °F - Altimeter: 30.05 inHg - Observed at: KAFW, 5 nm away - METAR: KAFW 271553Z VRB03KT 10SM CLR 28/07 A3005 RMK AO2 ## 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 20220527022229A](https://openairdocs.org/incident/20220527022229A), May 27, 2022: Piper PA-22-160, Roanoke, TX, Substantial damage. A preflight was completed on [privacy data omitted] on the date of the flight. Magneto checks were completed at north Texas regional (52F) and mineral wells… ## Other investigations on N8926D (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 DEN75DTE03](https://openairdocs.org/ntsb/DEN75DTE03), Jul 13, 1974: Piper PA-22 (N8926D), Akron, CO, substantial damage ## Docket (4 files) The files NTSB released with the investigation on February 23, 2023, on NTSB's docket system: https://data.ntsb.gov/Docket?ProjectID=105187. 1.6 MB in all. - Memorandum for the record pilot report summary CEN22LA225 (item 1, PDF, 1 page, 134 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=15054687&FileExtension=pdf&FileName=Memorandum%20for%20the%20Record%20Pilot%20Report%20Summary%20CEN22LA225_Redacted-Rel.pdf - Memorandum for the record brake system examination findings CEN22LA225 (item 2, PDF, 1 page, 132 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=15054184&FileExtension=pdf&FileName=Memorandum%20for%20the%20Record%20Brake%20System%20Examination%20Findings%20CEN22LA225_Redacted-Rel.pdf - Memorandum for the record Piper engineering diagram CEN22LA225 (item 3, PDF, 2 pages, 268 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=15054628&FileExtension=pdf&FileName=Memorandum%20for%20the%20Record%20Piper%20Engineering%20Diagram%20CEN22LA225_Redacted-Rel.pdf - Photo array CEN22LA225 (item 4, PDF, 2 pages, 1.1 MB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=15055106&FileExtension=pdf&FileName=Photo%20Array%20CEN22LA225-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.