Pratt & Whitney PW4056 airworthiness directives

Airworthiness directives that may apply · 25

ADs whose products match this engine model. Each AD’s applicability may narrow it by serial number, part number or configuration.

1990In forceSuperseded2026

ADs by the year they took effect: 38 ADs
1990	1
1993	1
1996	1
1998	1
1999	4
2000	3
2001	4
2002	4
2003	2
2006	1
2009	1
2010	2
2011	1
2012	8
2015	1
2016	1
2018	1
2026	1

Engine · Pratt & Whitney PW4056

AD 2026-21-06Engine Fuel and ControlEffective Nov 23, 2026 AD 2018-13-02Turbine Engine Combustion SectionEffective Jul 20, 2018 AD 2016-08-09HPC 10th stage diskEffective Jun 1, 2016

See all 39 ADs

Query with SQL

duckdb -csv -c "SELECT d.ad_number, d.status, d.subject, d.effective_date
  FROM 'https://openairdocs.org/data/latest/faa_directive.parquet' d
  WHERE d.ad_id IN (SELECT ad_id FROM 'https://openairdocs.org/data/latest/faa_engine_model_directive.parquet' WHERE engine_model_code IN ('51665'))
  ORDER BY coalesce(d.effective_date, d.publication_date, d.issue_date) DESC, d.ad_number DESC"

Prints the whole list as CSV. It reads the release’s Parquet files over HTTPS, so there’s nothing to download first. Install DuckDB to run it.

SELECT d.ad_number, d.status, d.subject, d.effective_date
FROM 'https://openairdocs.org/data/latest/faa_directive.parquet' d
WHERE d.ad_id IN (SELECT ad_id FROM 'https://openairdocs.org/data/latest/faa_engine_model_directive.parquet' WHERE engine_model_code IN ('51665'))
ORDER BY coalesce(d.effective_date, d.publication_date, d.issue_date) DESC, d.ad_number DESC

Run it at the DuckDB prompt, or in any tool that reads Parquet over HTTPS. More ways to query the release are on Use the data.

Information bulletins that may apply · 5

Engine · Pratt & Whitney PW4056

SAIB 2025-06High Pressure TurbinesIssued Jul 22, 2025 SAIB NE-19-02Turbine Engine Compressor Section -- Low-pressure turbine uncontainmentIssued Feb 19, 2019 SAIB NE-16-01R1Turbine SectionIssued Jan 14, 2016 SAIB NE-15-19Turbine SectionIssued Jul 14, 2015 SAIB NE-13-31Turbine Engine Oil System Scavenge Oil Tube Coking and Proper Cleaning at OverhaulIssued May 9, 2013

Historical bulletins · 1

SAIB NE-16-01Turbine SectionIssued Oct 5, 2015

Query with SQL

duckdb -csv -c "SELECT s.saib_number, any_value(s.title) AS title, max(s.issue_date) AS issue_date, any_value(s.status) AS status
  FROM 'https://openairdocs.org/data/latest/faa_saib.parquet' s
  WHERE s.saib_id IN (SELECT saib_id FROM 'https://openairdocs.org/data/latest/faa_engine_model_saib.parquet' WHERE engine_model_code IN ('51665'))
  GROUP BY s.saib_number ORDER BY issue_date DESC"

Prints the whole list as CSV. It reads the release’s Parquet files over HTTPS, so there’s nothing to download first. Install DuckDB to run it.

SELECT s.saib_number, any_value(s.title) AS title, max(s.issue_date) AS issue_date, any_value(s.status) AS status
FROM 'https://openairdocs.org/data/latest/faa_saib.parquet' s
WHERE s.saib_id IN (SELECT saib_id FROM 'https://openairdocs.org/data/latest/faa_engine_model_saib.parquet' WHERE engine_model_code IN ('51665'))
GROUP BY s.saib_number ORDER BY issue_date DESC

Run it at the DuckDB prompt, or in any tool that reads Parquet over HTTPS. More ways to query the release are on Use the data.

Registered aircraft · 25

N197UAUnited Airlines Inc · Chicago, ILBuilt 1997 · S/N 26901 N351SLBank Of Utah Trustee · Salt Lake City, UTBuilt 2018 · S/N 001 N471MCAtlas Air Inc · White Plains, NYBuilt 1997 · S/N 26557

See all 25 registered aircraft

Query with SQL

duckdb -csv -c "SELECT n_number, serial_number, year_manufactured, status, registrant_name, registrant_city, registrant_state
  FROM 'https://openairdocs.org/data/latest/faa_aircraft_registration.parquet'
  WHERE engine_model_code IN ('51665')
  ORDER BY n_number"

Prints the whole list as CSV. It reads the release’s Parquet files over HTTPS, so there’s nothing to download first. Install DuckDB to run it.

SELECT n_number, serial_number, year_manufactured, status, registrant_name, registrant_city, registrant_state
FROM 'https://openairdocs.org/data/latest/faa_aircraft_registration.parquet'
WHERE engine_model_code IN ('51665')
ORDER BY n_number

Run it at the DuckDB prompt, or in any tool that reads Parquet over HTTPS. More ways to query the release are on Use the data.

NTSB investigations · 3

Aircraft matched to this engine model through the registry, by N-number and event date, checked against the reported serial number, make and model.

Defining event, 2008 on

Of 3 cases NTSB coded with a defining event. All defining events

In the probable cause, 2008 on

Findings NTSB made part of the probable cause. A case can have several. All findings

NTSB DCA22LA038Accident · No injuriesClass 4 · LimitedFinal reportBoeing 747-4B5F · Miami, FLIncorrect lubrication of the foreflap fitting assembly.Nov 29, 2021 · N705CK · Substantial damage NTSB DCA20CA077Accident · No injuriesClass 4 · Data collectionFinal reportBoeing 747 412 · Los Angeles, CAAn unavoidable collision with a garbage dumpster that had blown into the path of the airplane during the takeoff roll.Feb 3, 2020 · N703CK · Substantial damage NTSB DCA14IA016Incident · No injuriesIncident investigationFinal reportBoeing 747 - 409LCF · Wichita, KSthe flight crew's failure to properly identify the airport and runway of intended landing. Contributing to the incident was the flight crew's failure to follow company procedures for crosschecking navigational information and visual cues to verify the airport…Nov 22, 2013 · N780BA · No damage

Query with SQL

SELECT c."ntsbNumber", c."eventDate", c."eventType", c."eventCity", c."eventStateOrRegion", a.n_number, a."aircraftMake", a."aircraftModel", c."highestInjuryLevel", c."totalFatal", c."completionStatus", c.report_url FROM 'https://openairdocs.org/data/latest/ntsb_aircrafts.parquet' a JOIN 'https://openairdocs.org/data/latest/ntsb_case_detail.parquet' c ON c."mKey" = a.case_mkey WHERE a.engine_model_code IN ('51665') ORDER BY c."eventDate" DESC, c."ntsbNumber" DESC

duckdb -csv -c "SELECT c.\"ntsbNumber\", c.\"eventDate\", c.\"eventType\", c.\"eventCity\", c.\"eventStateOrRegion\", a.n_number, a.\"aircraftMake\", a.\"aircraftModel\", c.\"highestInjuryLevel\", c.\"totalFatal\", c.\"completionStatus\", c.report_url
  FROM 'https://openairdocs.org/data/latest/ntsb_aircrafts.parquet' a JOIN 'https://openairdocs.org/data/latest/ntsb_case_detail.parquet' c ON c.\"mKey\" = a.case_mkey
  WHERE a.engine_model_code IN ('51665')
  ORDER BY c.\"eventDate\" DESC, c.\"ntsbNumber\" DESC"

Prints the whole list as CSV. It reads the release’s Parquet files over HTTPS, so there’s nothing to download first. Install DuckDB to run it.

SELECT c."ntsbNumber", c."eventDate", c."eventType", c."eventCity", c."eventStateOrRegion", a.n_number, a."aircraftMake", a."aircraftModel", c."highestInjuryLevel", c."totalFatal", c."completionStatus", c.report_url
FROM 'https://openairdocs.org/data/latest/ntsb_aircrafts.parquet' a JOIN 'https://openairdocs.org/data/latest/ntsb_case_detail.parquet' c ON c."mKey" = a.case_mkey
WHERE a.engine_model_code IN ('51665')
ORDER BY c."eventDate" DESC, c."ntsbNumber" DESC

Run it at the DuckDB prompt, or in any tool that reads Parquet over HTTPS. More ways to query the release are on Use the data.

FAA incident reports · 5

Matched to this engine model through the registry, by N-number and event date, checked against the reported make and model.

Incident 20220629012749IBoeing 747-4B5 · Anchorage, AKOn 06/29/2022 aircraft [privacy data omitted]was pushed back from vhhh for flight to panc. After departure during the climb as flaps were retracted a heavy vibration , specifically during flaps 5 and all the way to flaps up, after flaps up the vibration…Jun 29, 2022 · N707CK · Substantial damage Incident 20211022022329IBoeing 747-412 · Muwaffaq SaltiOn October 22, 2021 approximately 0835Z [privacy data omitted] aircraft [privacy data omitted](B-747-412) was damaged in a collision accident with a parked air stair truck while attempting to taxi for takeoff at the Muwaffaq Salti air base in jordan. The…Oct 22, 2021 · N756CA · Minor damage Accident 20200203002879ABoeing 747-412 · Los Angeles, CAOn Monday, February 3, 2020 approximately at 03:08 PST kalitta air, flight CKS368, aircraft N703CK during takeoff on rwy 25R at approximately 100KTS struck trash container and aborted takeoff. Aircraft blew both nose gear tires and sustained considerable…Feb 3, 2020 · N703CK · Substantial damage Incident 20070602012399IBoeing 747409 · Idaho Falls, ID(-23) 6-2-07 Aircraft was conducting operations at Idaho Falls airport on Saturday, June 2, 2007. At approximately 8:28 pm during taxi for takeoff the number 4 engine nacelle inboard side struck a metal fence post. This went unnoticed by the crewmembers and…Jun 2, 2007 · N780BA · Minor damage Incident 20061207027599IBoeing 7474J6 · Renton, WA(-23) The Boeing large cargo freighter (lcf) was on departure from bfi heading to the south and had deployed a piece of test equipment called a trailing cone. The trailing cone and approximately 150 ft of 1/2" polycarbonate tubing separated from the aircraft…Dec 7, 2006 · N747BC

Query with SQL

duckdb -csv -c "SELECT report_number, event_date, event_type, city, state, aircraft_make, aircraft_model, aircraft_damage, fatal_injuries, n_number
  FROM 'https://openairdocs.org/data/latest/faa_incident_report.parquet'
  WHERE engine_model_code IN ('51665')
  ORDER BY event_date DESC, report_number DESC"

Prints the whole list as CSV. It reads the release’s Parquet files over HTTPS, so there’s nothing to download first. Install DuckDB to run it.

SELECT report_number, event_date, event_type, city, state, aircraft_make, aircraft_model, aircraft_damage, fatal_injuries, n_number
FROM 'https://openairdocs.org/data/latest/faa_incident_report.parquet'
WHERE engine_model_code IN ('51665')
ORDER BY event_date DESC, report_number DESC

Run it at the DuckDB prompt, or in any tool that reads Parquet over HTTPS. More ways to query the release are on Use the data.

Service difficulty reports · 12,594

SDR CALA2026073118122Wire · detachedDOOR 1L AND 1R EXIT THRESHOLD LIGHT STAY ON WHEN SWITCHED OFF FOUND PIN 3 OPENED BETWEEN CONNECTOR D10718 AND D6410 IAW WDM 33-51-11-2C SH2 FOUND WIRE W822-003-22 SNAPPED OFF BELOW DOOR 1L REAR FACING CREW SEAT. WIRE SPLICED PER LP 9788837. BATTERY CHARGING PAJul 30, 2026 · N665UA · Boeing 767322 · Light System Wiring SDR U2RA2026071600037Pump · leakingEICAS -HYD QTY LOW 1- DISPLAYED DURING CRUISE. REPLACED LEAKING NR 1 AIR DRIVEN HYDRAULIC PUMP.Jul 12, 2026 · N729CA · Boeing 747412 · Hydraulic Pump (Electric/Engine), Main SDR KCSA20260619733Oil System · lowON DESCENT NOTICED STRONG ODOR OF OIL ON UPPER DECK AND MAIN DECK CREW REPORTED LOW OIL ON ENG 4, INDICATED 4 QUARTS. PERFORMED CONDITIONAL INSPECTION OF #4 ENG IAW FIM 21-00 TASK 810 NO EXTERNAL LEAKS FOUND. SERVICED ENG OIL IAW AMM 12-13-03.Jun 17, 2026 · N706CK · Boeing 7474B5F · Turbine Engine Oil System

See all 12,594 difficulty reports

Query with SQL

duckdb -csv -c "SELECT sdr_id, difficulty_date, n_number, aircraft_make, aircraft_model, part_name, part_condition, jasc_code, discrepancy
  FROM 'https://openairdocs.org/data/latest/faa_service_difficulty_report.parquet'
  WHERE engine_model_key = 'PW4056'
  ORDER BY difficulty_date DESC"

Prints the whole list as CSV. It reads the release’s Parquet files over HTTPS, so there’s nothing to download first. Install DuckDB to run it.

SELECT sdr_id, difficulty_date, n_number, aircraft_make, aircraft_model, part_name, part_condition, jasc_code, discrepancy
FROM 'https://openairdocs.org/data/latest/faa_service_difficulty_report.parquet'
WHERE engine_model_key = 'PW4056'
ORDER BY difficulty_date DESC

Run it at the DuckDB prompt, or in any tool that reads Parquet over HTTPS. More ways to query the release are on Use the data.

STCs that may be installed · 3

Approved for this engine model: the STC’s model list names it on its data sheet, or a series that includes it. The registry doesn’t record which STCs an aircraft has.

STC SE01543CHReplace Hamilton Sundstrand P/N 778839-13, 778839-14, 778839-19, 778839-20, 778839-37, 778839-38, 816682-1, 840618-2, 880724 carbon bushings with Cook Airtomic P/N AIR22947 Slotted Entry Busing in the High Pressure Shutoff Valve.Cook Airtomic STC SE00053AT-DModification of fan exit guide vane, to line replaceable unit configuration.Chromalloy Gas Turbine Corp.STC SE00131LAModification of the subject engines to incorporate an oil tank reservoir insulation blanket in accordance with Hi Temp Insulation Inc. Drawing List 46M1024-301, Revision N/C, dated December 5, 1995, or later FAA approved revision as an acceptable alternate to Pratt & Whitney part number 50R280-01 or 51R059-01 insulation blankets.Hi Temp Insulation Inc

Query with SQL

SELECT s.stc_number, s.description, s.holder, s.status, s.status_date, m.matched_model FROM ( SELECT stc_number, min(matched_model) AS matched_model FROM 'https://openairdocs.org/data/latest/faa_engine_model_stc.parquet' WHERE engine_model_code IN ('51665') GROUP BY stc_number ) m JOIN 'https://openairdocs.org/data/latest/faa_stc.parquet' s USING (stc_number) ORDER BY s.status = 'Current' DESC, s.status_date DESC, s.stc_number

duckdb -csv -c "SELECT s.stc_number, s.description, s.holder, s.status, s.status_date, m.matched_model
  FROM (
    SELECT stc_number, min(matched_model) AS matched_model
    FROM 'https://openairdocs.org/data/latest/faa_engine_model_stc.parquet'
    WHERE engine_model_code IN ('51665')
    GROUP BY stc_number
  ) m JOIN 'https://openairdocs.org/data/latest/faa_stc.parquet' s USING (stc_number)
  ORDER BY s.status = 'Current' DESC, s.status_date DESC, s.stc_number"

Prints the whole list as CSV. It reads the release’s Parquet files over HTTPS, so there’s nothing to download first. Install DuckDB to run it.

SELECT s.stc_number, s.description, s.holder, s.status, s.status_date, m.matched_model
FROM (
  SELECT stc_number, min(matched_model) AS matched_model
  FROM 'https://openairdocs.org/data/latest/faa_engine_model_stc.parquet'
  WHERE engine_model_code IN ('51665')
  GROUP BY stc_number
) m JOIN 'https://openairdocs.org/data/latest/faa_stc.parquet' s USING (stc_number)
ORDER BY s.status = 'Current' DESC, s.status_date DESC, s.stc_number

Run it at the DuckDB prompt, or in any tool that reads Parquet over HTTPS. More ways to query the release are on Use the data.