Aircraft model · Fixed wing multi engine · Airplane · registry code 138404I

Manufacturer (registry)
BOEING
Model
727-121C
Registry code
138404I
Registered
0 aircraft
Type
Fixed wing multi engine
Engines
3 · Turbo-fan
Seats
134
Weight class
20,000 lb and over
Certification
Not type certificated
Data sheet
TCDSA3WE
Holder
The Boeing Company

Model codes come from the FAA registry’s reference file. ADs are matched to them by model name and maker.

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Airworthiness directives that may apply · 252

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

1964In forceSuperseded2026
ADs by the year they took effect: 254 ADs
19642
19653
19666
19675
19686
19694
19702
19712
19721
19732
19743
19755
19764
19773
19782
19796
19803
19815
19822
19833
19855
19862
19876
19887
19895
199013
19919
19929
19935
199410
19954
19963
19973
19984
19998
20006
20014
20029
20032
20045
20058
20065
20073
20087
20095
20101
20116
20139
20146
20172
20183
20191
20203
20211
20221
20233
20262
See all 261 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_aircraft_model_directive.parquet' WHERE aircraft_model_code IN ('138404I'))
  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.

Information bulletins that may apply · 7

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_aircraft_model_saib.parquet' WHERE aircraft_model_code IN ('138404I'))
  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.

Registered aircraft · 0

No aircraft currently registered with this model

NTSB investigations

No NTSB investigations matched to aircraft with this modelMatched through the registry by N-number, so foreign aircraft and some older cases aren’t counted.

FAA incident reports

No reports matched to aircraft of this modelMatched through the registry by N-number, so foreign aircraft and some older reports aren’t counted.

Service difficulty reports · 8

SDR C1HA200192003Connector · dirtyAFTER GEAR RETRACT LEFT MLG DOOR ANNUNCIATOR ILLUMINATED. CYCLED GEAR LIGHT WENT OUT. CLEANED CANNON PLUG ON DOOR ACTUATOR.Apr 23, 2001 · N292AS · Boeing 727121C · Landing Gear Door ActuatorSDR C1HA200192002Charger · failedRT FWD EMERGENCY OVERWING WALKWAY LIGHT INOP. REMOVED AND REPLACED BATTERY AND CHARGER.Feb 8, 2001 · N292AS · Boeing 727121C · Emergency LightingSDR C1HA200192001Accessory Unit · failedAFTER GEAR RETRACTION LEFT MAIN GEAR DOOR INDICATED DOWN. CYCLED GEAR A 2ND TIME AND LEFT AND RIGHT GEAR DOORS INDICATED DOWN. ALSO, LEFT AND RIGHT GEAR INDICATED DOWN AND LOCKED WITH GEAR HANDLE IN THE UP POSITION AND IN THE OFF POSITION. REMOVED AND REPLAJan 25, 2001 · N292AS · Boeing 727121C · Landing Gear Retraction/Extension SystemSDR C1HA200092006Window · crackedNR 2 SLIDING WINDOW LEFT SIDE OUTER PANE CRACKED DURING FLIGHT. R&R NR 2 SLIDING WINDOW & R&R HEAT CONTROLLER.Dec 29, 2000 · N292AS · Boeing 727121C · Flight Compartment WindowsSDR C1HA200092005Light · failedPORTABLE EMERGENCY LIGHT ABOVE R1 DOOR INOP. REPLACED LIGHT ASSY.Dec 27, 2000 · N292AS · Boeing 727121C · Emergency LightingSDR C1HA200092004Sign · detachedEMERGENCY EXIT SIGN FELL OFF BY R2 DOOR.Sep 10, 2000 · N292AS · Boeing 727121C · Emergency LightingSDR C1HA200092003Duct · failedAFTER TAKEOFF CREW REPORTED FIRE WARNING ON NR 1 ENGINE. CREW FOLLOWED STANDARD PROCEDURES AND RETURNED TO MBJ.CAUSE: RUPTURED 13TH STAGE SADDLE DUCT #1 ENG.Apr 9, 2000 · N292AS · Boeing 727121C · Engine Bleed Air SystemSDR C1HA200092002Battery Pack · dischargedCOCKPIT EMERGENCY EXIT LIGHT WILL NOT ILLUMINATE WHILE PERFORMING COCKPIT PRE-FLIGHT TEST.Mar 30, 2000 · N292AS · Boeing 727121C · Emergency Lighting
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 aircraft_model_key = '727121C'
  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.

STCs that may be installed · 619

Approved for this 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.

See all 619 STCs
Query with SQL
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_aircraft_model_stc.parquet'
    WHERE aircraft_model_code IN ('138404I')
    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.

The same model under other registry codes

Amateur-built copies and renamed makers get their own codes.

Query with SQL
duckdb -csv -c "SELECT m.code, m.manufacturer, m.model, count(g.n_number) AS aircraft
  FROM 'https://openairdocs.org/data/latest/faa_aircraft_model.parquet' m LEFT JOIN 'https://openairdocs.org/data/latest/faa_aircraft_registration.parquet' g ON g.aircraft_model_code = m.code
  WHERE m.match_key = '727100C' AND m.code NOT IN ('138404I')
  GROUP BY ALL
  ORDER BY aircraft DESC
  LIMIT 12"

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.