# Noise suppressor

- Type: NTSB finding subsection
- Path: [Aircraft](https://openairdocs.org/ntsb-findings/01) › [Aircraft power plant](https://openairdocs.org/ntsb-findings/0105) › [Engine exhaust](https://openairdocs.org/ntsb-findings/010578) › Noise suppressor
- NTSB code: 01057820
- Cases: 4
- In the probable cause: 4
- Fatal cases: 1
- All cases: https://openairdocs.org/ntsb-findings/01057820/cases.md
- Cases with it in the probable cause: https://openairdocs.org/ntsb-findings/01057820/cases.md?cause=1
- Page: https://openairdocs.org/ntsb-findings/01057820

## Cases per year (in the probable cause / all)

- 2008: 1 / 1
- 2011: 1 / 1
- 2018: 1 / 1
- 2021: 1 / 1

## Defining events in these cases

- [Loss of engine power (partial)](https://openairdocs.org/ntsb-events/342): 2 cases
- [Loss of engine power (total)](https://openairdocs.org/ntsb-events/341): 1 cases
- [Fire/smoke (non-impact)](https://openairdocs.org/ntsb-events/150): 1 cases

## Aircraft models (registry)

- [Piper PA-28R-201T](https://openairdocs.org/model/piper-pa-28r-201t): 1 cases
- [Cessna R182](https://openairdocs.org/model/cessna-r182): 1 cases
- [Beech 35-A33](https://openairdocs.org/model/beech-35-a33): 1 cases
- [L-Bird CCX-2000](https://openairdocs.org/model/l-bird-ccx-2000): 1 cases

## Other findings in the same cases

- [Engine exhaust, general](https://openairdocs.org/ntsb-findings/01057800) (Aircraft): 3 cases
- [Tree(s)](https://openairdocs.org/ntsb-findings/03022020) (Environmental issues): 2 cases
- [Scheduled/routine inspection](https://openairdocs.org/ntsb-findings/02061520) (Personnel issues): 1 cases
- [Forgotten action/omission](https://openairdocs.org/ntsb-findings/02041035) (Personnel issues): 1 cases

## Newest cases

- [NTSB WPR21LA250](https://openairdocs.org/ntsb/WPR21LA250), Jun 28, 2021: L-Bird CCX-2000 (N10TA), Hood River, OR, substantial damage. Probable cause: The total loss of engine power due to improper construction of the muffler, which resulted in separation of the internal components.
- [NTSB ERA18FA146](https://openairdocs.org/ntsb/ERA18FA146), May 13, 2018: Beech 35A33 (N486T), Jacksonville, AL, destroyed, 1 fatal. Probable cause: The pilot/mechanic's inadequate inspection of the exhaust system, including the left muffler and heat exchanger, which precluded his detection of preexisting cracks and led to a missed opportunity to…
- [NTSB WPR11LA311](https://openairdocs.org/ntsb/WPR11LA311), Jul 6, 2011: Cessna R182 (N7392X), Hesperia, CA, substantial damage. Probable cause: The separation of the end baffle cone inside the muffler, which blocked airflow through the engine after takeoff and resulted in a loss of engine power and an off-airport landing into obstacles.
- [NTSB NYC08LA202](https://openairdocs.org/ntsb/NYC08LA202), Jun 3, 2008: Piper PA-28R-201T (N230ME), Palatka, FL, substantial damage. Probable cause: A partial loss of engine power due to a blockage of the engine exhaust system as a result of an internal failure of the muffler.

NTSB has coded findings and defining events since 2008; earlier cases used its older occurrence and cause codes and aren't counted.

Findings: https://openairdocs.org/ntsb-findings.md. Defining events: https://openairdocs.org/ntsb-events.md. Phases of flight: https://openairdocs.org/ntsb-phases.md. Every investigation, filtered by finding, event, phase, state, year or model: https://openairdocs.org/ntsb.md (for example ?state=MI&fatal=1).

NTSB's definitions: Accident and incident, 49 CFR 830.2 (https://www.ecfr.gov/current/title-49/subtitle-B/chapter-VIII/part-830/subpart-A/section-830.2), CICTT occurrence categories (PDF) (https://www.ntsb.gov/safety/data/Documents/datafiles/OccurrenceCategoryDefinitions.pdf), CICTT phases of flight (PDF) (https://www.ntsb.gov/safety/data/Documents/datafiles/PhaseofFlightDefinitions.pdf), and NTSB coding manual, before 2008 (PDF) (https://www.ntsb.gov/GILS/Documents/codman.pdf). NTSB publishes no definitions for its findings, only their names.

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