# NTSB CEN25LA225: Tecnam P2010, N258CM, Temple, TX, June 26, 2025 - Type: NTSB accident investigation - Classification: Accident · No injuries · Class 3 · Limited · Final report - Date: June 26, 2025, 11:30 local (16:30 UTC) - Place: Temple, TX - Coordinates: 31.165145, -97.414317 (estimated) - Nearby events: https://openairdocs.org/map.md?lat=31.1651&lon=-97.4143&mi=10 - Phase of flight: [Approach](https://openairdocs.org/ntsb-phases/500) (OpenAirDocs' grouping) - Defining event: [Approach-VFR pattern downwind: Loss of engine power (total)](https://openairdocs.org/ntsb-events/341) - Highest injury: No injuries - Injuries: 2 uninjured - Status: Completed, report July 16, 2026 - Report: Approved by Office Director - Investigation class: Class 3 - NTSB office: Central Region - Parties: Lycoming Engines, FAA - ADs cited in the narratives: [AD 2026-07-05](https://openairdocs.org/ad/2026-07-05) (OpenAirDocs) - NTSB case key (mKey): 200412 - NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=CEN25LA225 - NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/200412/pdf - NTSB docket: https://data.ntsb.gov/Docket?ProjectID=200412 - Page: https://openairdocs.org/ntsb/CEN25LA225 ## Probable cause The loss of engine power due to a failed muffler flame tube assembly which resulted in an exhaust blockage. ## Findings NTSB's coded findings; those marked are part of the probable cause. - [Engine exhaust](https://openairdocs.org/ntsb-findings/01057800): Aircraft › Aircraft power plant · Fatigue/wear/corrosion (probable cause); cases with it: [Costruzioni Aeronautiche Tecna P2010, 1 case](https://openairdocs.org/ntsb-findings/01057800/cases.md?model=0330402), [All aircraft, 56 cases](https://openairdocs.org/ntsb-findings/01057800/cases.md) - [Engine exhaust](https://openairdocs.org/ntsb-findings/01057800): Aircraft › Aircraft power plant · Failure (probable cause); cases with it: [Costruzioni Aeronautiche Tecna P2010, 1 case](https://openairdocs.org/ntsb-findings/01057800/cases.md?model=0330402), [All aircraft, 56 cases](https://openairdocs.org/ntsb-findings/01057800/cases.md) ## Sequence of events The events NTSB coded, in order, by phase of flight. The defining event best describes what happened. - [Approach-VFR pattern downwind: Loss of engine power (total)](https://openairdocs.org/ntsb-events/341) (defining event); cases with it: [Costruzioni Aeronautiche Tecna P2010, 1 case](https://openairdocs.org/ntsb-events/341/sequence.md?model=0330402), [All aircraft, 3,820 cases](https://openairdocs.org/ntsb-events/341/sequence.md) ## Analysis According to the flight instructor, while on final approach to the runway the engine experienced a loss of power, and he executed a forced landing to a wooded area near the airport perimeter. The airplane impacted trees which resulted in substantial damage to both wings, the fuselage, and the stabilator. Postaccident examination of the airplane’s exhaust system revealed that a steel baffle of the muffler flame tube assembly had failed and blocked at least 95% of the single exhaust outlet port (tailpipe). Deformation damage was noted to the remaining flame tube and the steel baffle which indicated that the failure had been present for an unknown period of time before eventually blocking the exhaust path. There were no other mechanical malfunctions or failures that would have precluded normal operation. ## Factual narrative On June 26, 2025, about 1130 central daylight time, a Tecnam P2010 airplane, N258CM, was substantially damaged when it was involved in an accident near Temple, Texas. The flight instructor and student pilot were not injured. The airplane was operated as a Title 14 Code of Federal Regulations Part 91 instructional flight. The flight instructor reported that he had completed a preflight inspection, engine run-up, and two touch-and-go landings with no anomalies noted. During the third traffic pattern, while on the downwind leg, the flight instructor switched the fuel selector from the left tank to the right tank. He then verified that the electric fuel pump was on, and the engine instruments were indicating normal. While configured for landing on final approach, the flight instructor noticed an uncommanded change in manifold pressure. He took over the flight controls from the student pilot and moved the throttle lever full forward with no change to the manifold pressure. The flight instructor reported that there were no associated warning or caution crew alerting system (CAS) messages. The flight instructor switched the fuel selector to the left tank in an attempt to restore engine power; however, there was no change. Unable to make the runway, the flight instructor executed a forced landing into a wooded area near the airport perimeter. During the forced landing, the airplane impacted trees which resulted in substantial damage to both wings, the fuselage, and the stabilator. A postaccident examination of the engine revealed a blockage of at least 95% of the single exhaust outlet port as seen in figure 1. A functional engine test run was performed with the blockage present. The engine started without hesitation; however, the engine ran rough with fluctuating rpm. Following the functional engine test, the tailpipe was cut, and the blockage was removed. The piece that was removed was consistent with the steel baffle plate from the exhaust muffler flame tube assembly inside the muffler. A second functional engine test run of the engine was conducted with the blockage removed. The engine started without hesitation and ran at various rpms with no anomalies. Figure 1. Engine exhaust port with blockage as found. Further examination of the muffler revealed that a majority of the perforated flame tube was not present. The remaining flame tube and the steel baffle plate exhibited mushroom deformation. The muffler was original to the engine and had been in service about 1,224 hours. On September 19, 2025, Tecnam published Service Bulletin (SB) 937-CS “P2010 Lycoming Exhaust Muffler Flame Tube Inspection,” which stated in part, “Following an occurrence report involving a Tecnam P2010 aircraft equipped with a Lycoming engine, Tecnam has identified a potential risk concerning the structural integrity of the flame tube located within the exhaust muffler. If not addressed, this condition could result in a partial or complete obstruction of the exhaust system,potentially leading to engine malfunction or stoppage”. On February 2, 2026, the European Union Aviation Safety Agency issued Airworthiness Directive (AD) 2026-0023 concerning the safety issue which required repetitive inspection or an acceptable method of compliance/terminating action. On March 31, 2026, the FAA issued AD 2026-07-05 concerning the safety issue which required repetitive inspection or an optional terminating action. ## Aircraft - Registration: [N258CM](https://openairdocs.org/aircraft/N258CM), registered now, S/N 118/US, built 2020 (OpenAirDocs) - Reported make and model: TECNAM P2010 - Registry model: [Costruzioni Aeronautiche Tecna P2010](https://openairdocs.org/model/costruzioni-aeronautiche-tecna-p2010) (registry code 0330402) (OpenAirDocs) - Registry engine: [Lycoming IO-390-C3B6](https://openairdocs.org/engine/lycoming-io-390-c3b6) (registry code 42710, reciprocating) (OpenAirDocs) - Category: Airplane - Serial number: 118/US - Year built: 2020 - Airframe hours: 1224 - Engines: Lycoming Engines IO-390-C3B6 215 horsepower reciprocating - Damage: Substantial damage - Flight: Instructional, Part 91 - Operator: Kachemak Bay Flying Service Inc - Registered owner: Kachemak Bay Flying Service Inc - Airworthiness certificate: Standard, Normal - Last inspection: 100 hour, June 18, 2025, 4 hours before - Destination: Same as departure - Flight plan: Company VFR - Airport: TPL, Draughon-Miller Central Texas Regional Airport, runway 16, 7,000 × 150 ft, asphalt - Equipment: Auto-pilot, ADS-B, Stall warning system, Satellite tracking device, Onboard weather, Electronic primary flight display, Electronic multifunction display, Electronic flight bag or handheld device ## Flight crew As NTSB recorded them. NTSB leaves out names. - Flight instructor; age 25; injuries: none; commercial, flight instructor; airplane ratings: single-engine land; instrument ratings: airplane; medical: class 1, without waivers/limitations; last flight review January 12, 2025; seat: right; restraint: 3-point; flight hours: 473.5 total, 160.8 in this make and model, 407.6 as pilot in command, 131.5 in the last 90 days, 47.2 in the last 30 days, 3 in the last 24 hours ## Weather - Conditions: Visual (VMC), Day - Wind: 170° at 10 knots - Visibility: 10 statute miles - Temperature: 88 °F, dew point 72 °F - Altimeter: 30.07 inHg - Observed at: KTPL, 1 nm away - METAR: KTPL 261651Z AUTO 17010KT 10SM FEW025 31/22 A3007 RMK AO2 SLP172 T03110222 $ ## 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 20250626008269A](https://openairdocs.org/incident/20250626008269A), Jun 26, 2025: Costruzioni Aeronautiche Tecna P2010, Temple, TX, Substantial damage. The aircraft was returning from a local flight lesson. While in the airport traffic pattern, the pilot performed the pre-landing checklist. This checklist… ## Docket (8 files) The files NTSB released with the investigation on July 16, 2026, on NTSB's docket system: https://data.ntsb.gov/Docket?ProjectID=200412. 12.4 MB in all. - Pilot/operator aircraft accident report, NTSB form 6120.1 (item 1, PDF, 10 pages, 1.8 MB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=19351244&FileExtension=pdf&FileName=6120%20copy_Redacted-Rel.pdf - Examination summary (item 2, PDF, 6 pages, 584 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=19315262&FileExtension=pdf&FileName=Exam%20Summary_N258CM-Rel.pdf - Investigation photographs (item 3, PDF, 6 pages, 4 photos, 1.7 MB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=19314037&FileExtension=pdf&FileName=Photo%20Array-Rel.pdf - Release of aircraft wreckage, NTSB form 6120.15 (item 4, PDF, 1 page, 1.3 MB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=19313663&FileExtension=pdf&FileName=Wreckage%20Release_Redacted-Rel.pdf - Statement of party representatives to NTSB investigation (item 5, PDF, 1 page, 233 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=19313673&FileExtension=pdf&FileName=Party-Representative%20Form-DH_Redacted-Rel.pdf - Tecnam service bulletin 937-CS (item 6, PDF, 5 pages, 578 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=19315019&FileExtension=pdf&FileName=SB_937-CS_-_P2010_Lycoming_Exhaust_Muffler_Flame_Tube_Inspection-Rel.pdf - FAA airworthiness directive 2026-07-05 (item 7, PDF, 8 pages, 4.1 MB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=20632942&FileExtension=pdf&FileName=FAA%20AD-Rel.pdf - Easa airworthiness directive 2026-0023 (item 8, PDF, 3 pages, 2.1 MB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=20634776&FileExtension=pdf&FileName=EASA%20AD%202026-0023-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.