# N984HA: 1994 Dehavilland DHC-8-106

- Status: Valid registration
- Airframe: [Dehavilland DHC-8-106](https://openairdocs.org/model/dehavilland-dhc-8-106) (registry code 2809020, 44 seats)
- Engine: [Pratt & Whitney Canada PW121](https://openairdocs.org/engine/pratt-whitney-canada-pw121) (registry code 52124)
- Data sheets: [TCDS A13NM](https://openairdocs.org/tcds/A13NM) (De Havilland Aircraft of Canada Limited), [TCDS E20NE](https://openairdocs.org/tcds/E20NE) (Pratt & Whitney Canada Corp.) (OpenAirDocs)
- Serial number: 377
- Year built: 1994
- Type: Fixed wing multi engine
- Engine type: Turbo-prop
- Airworthiness: Experimental, research and development
- Airworthiness date: August 1, 2025
- Certificate issued: January 5, 2012
- Expires: January 31, 2028
- Mode S code: ADBAB0
- Registered owner: [Northrop Grumman Systems Corp](https://openairdocs.org/faa-owner/NORTHROP%20GRUMMAN%20SYSTEMS%20CORP)
- Location: [El Segundo, CA](https://openairdocs.org/faa-place/CA/El%20Segundo)
- Owner type: Corporation
- Owner's area on the map: 33.9171° N, 118.4016° W: Placed by OpenAirDocs at the center of ZIP code 90245, within about a mile (OpenAirDocs). The owner's mailing address, not where the aircraft is based
- FAA registry: https://registry.faa.gov/AircraftInquiry/Search/NNumberResult?nNumberTxt=984HA
- Page: https://openairdocs.org/aircraft/N984HA

From the FAA registry file of October 24, 2026. ADs below are matched by the registry's airframe and engine model codes. They may apply; each AD's applicability can narrow it by serial number, part number or installed equipment. This is not a compliance determination.

## ADs that may apply (OpenAirDocs): 162 in force

### Matched by airframe (Dehavilland DHC-8-106)

- [AD 2026-11-06](https://openairdocs.org/ad/2026-11-06): Hardware; Standard practices/structures · De Havilland Aircraft of Canada DHC-8-101, DHC-8-102, DHC-8-103 and 9 more. Effective Jul 9, 2026
- [AD 2026-13-02](https://openairdocs.org/ad/2026-13-02): Navigation · Airbus Canada Limited Partnership 18, 49-46, 80-A and 555 more. Effective Jul 1, 2026
- [AD 2021-19-11](https://openairdocs.org/ad/2021-19-11): Flight controls · De Havilland Aircraft of Canada DHC-8-102, DHC-8-103, DHC-8-106 and 8 more. Effective Nov 18, 2021
- [AD 2019-12-17](https://openairdocs.org/ad/2019-12-17): Stabilizers · Bombardier DHC-8-102, DHC-8-103, DHC-8-106 and 5 more. Effective Aug 12, 2019
- [AD 2018-23-04](https://openairdocs.org/ad/2018-23-04): Engine Controls · Bombardier DHC-8-102, DHC-8-103, DHC-8-106 and 5 more. Effective Mar 15, 2019
- [AD 2018-20-12](https://openairdocs.org/ad/2018-20-12): Ice and rain protection · Bombardier DHC-8-102, DHC-8-103, DHC-8-106 and 5 more. Effective Nov 23, 2018
- [AD 2017-15-11](https://openairdocs.org/ad/2017-15-11): Landing Gear · Bombardier DHC-8-102, DHC-8-103, DHC-8-106 and 5 more. Effective Sep 5, 2017
- [AD 2017-08-02](https://openairdocs.org/ad/2017-08-02): Ignition · Bombardier DHC-8-102, DHC-8-103, DHC-8-106 and 5 more. Effective May 17, 2017
- [AD 2016-24-06](https://openairdocs.org/ad/2016-24-06): Ice and rain protection · Bombardier DHC-8-102, DHC-8-103, DHC-8-106 and 5 more. Effective Jan 12, 2017
- [AD 2016-24-01](https://openairdocs.org/ad/2016-24-01): Electrical Power · Bombardier DHC-8-102, DHC-8-103, DHC-8-106 and 5 more. Effective Dec 30, 2016
- [AD 2016-10-07](https://openairdocs.org/ad/2016-10-07): Electrical power · Bombardier DHC-8-102, DHC-8-103, DHC-8-106 and 5 more. Effective Jun 23, 2016
- [AD 2015-21-02](https://openairdocs.org/ad/2015-21-02): Electrical Power · Bombardier DHC-8-102, DHC-8-103, DHC-8-106 and 5 more. Effective Nov 24, 2015
- [AD 2015-14-03](https://openairdocs.org/ad/2015-14-03): Fuel · Bombardier DHC-8-102, DHC-8-103, DHC-8-106 and 5 more. Effective Aug 21, 2015
- [AD 2015-04-08](https://openairdocs.org/ad/2015-04-08): Landing Gear · Bombardier DHC-8-102, DHC-8-103, DHC-8-106 and 5 more. Effective Apr 27, 2015
- [AD 2013-15-06](https://openairdocs.org/ad/2013-15-06): Electrical Power · Bombardier DHC-8-102, DHC-8-103, DHC-8-106 and 5 more. Effective Oct 20, 2014
- [AD 2014-15-07](https://openairdocs.org/ad/2014-15-07): Wings · Bombardier DHC-8-102, DHC-8-103, DHC-8-106 and 5 more. Effective Sep 2, 2014
- [AD 2014-13-18](https://openairdocs.org/ad/2014-13-18): Instruments, Engine Controls · Bombardier DHC-8-102, DHC-8-103, DHC-8-106 and 5 more. Effective Aug 19, 2014
- [AD 2014-05-17](https://openairdocs.org/ad/2014-05-17): Fuel · Bombardier DHC-8-102, DHC-8-103, DHC-8-106 and 5 more. Effective May 2, 2014
- [AD 2013-22-04](https://openairdocs.org/ad/2013-22-04): Flight controls · Bombardier DHC-8-102, DHC-8-103, DHC-8-106 and 8 more. Effective Dec 5, 2013
- [AD 2013-16-12](https://openairdocs.org/ad/2013-16-12): Nacelles/pylons · Bombardier DHC-8-102, DHC-8-103 and DHC-8-106. Effective Sep 24, 2013
- [AD 2013-14-09](https://openairdocs.org/ad/2013-14-09): Landing gear · Bombardier DHC-8-101, DHC-8-102, DHC-8-103 and 6 more. Effective Sep 10, 2013
- [AD 2013-04-07](https://openairdocs.org/ad/2013-04-07): Electrical Power · Bombardier DHC-8-102, DHC-8-103, DHC-8-106 and 5 more. Effective Apr 9, 2013
- [AD 2012-15-16](https://openairdocs.org/ad/2012-15-16): Landing gear · Bombardier DHC-8-102, DHC-8-103, DHC-8-106 and 8 more. Effective Sep 12, 2012
- [AD 2012-04-08](https://openairdocs.org/ad/2012-04-08): Flight controls · Bombardier DHC-8-102, DHC-8-103, DHC-8-106 and 8 more. Effective Apr 10, 2012
- [AD 2012-05-07](https://openairdocs.org/ad/2012-05-07): Engine Controls · Bombardier DHC-8-102, DHC-8-103 and DHC-8-106. Effective Apr 4, 2012
- [AD 2011-21-08](https://openairdocs.org/ad/2011-21-08): Equipment/Furnishings · ATR - GIE Avions de Transport Régional ATR42-200, ATR42-300, ATR42-320 and 202 more. Effective Nov 23, 2011
- [AD 2011-21-04](https://openairdocs.org/ad/2011-21-04): Doors · Bombardier DHC-8-102, DHC-8-103, DHC-8-106 and 5 more. Effective Nov 16, 2011
- [AD 2011-09-12](https://openairdocs.org/ad/2011-09-12): Windows · Bombardier DHC-8-101, DHC-8-102, DHC-8-103 and 8 more. Effective Jun 6, 2011
- [AD 2011-01-09](https://openairdocs.org/ad/2011-01-09): Oxygen · Airbus A300 B2-1A, A300 B2-1C, A300 B2-203 and 290 more. Effective Feb 9, 2011
- [AD 2010-21-02](https://openairdocs.org/ad/2010-21-02): Landing gear · Bombardier DHC-8-101, DHC-8-102, DHC-8-103 and 9 more. Effective Nov 12, 2010
- [AD 2010-05-12](https://openairdocs.org/ad/2010-05-12): Wings · Bombardier DHC-8-102, DHC-8-103, DHC-8-106 and 2 more. Effective Apr 13, 2010
- [AD 2010-04-12](https://openairdocs.org/ad/2010-04-12): Landing Gear, Standard Practices/Structures, Doors, Fuselage, Nacelles/Pylons, Stabilizers and  Wings. · Bombardier DHC-8-101, DHC-8-102, DHC-8-103 and 6 more. Effective Apr 8, 2010
- [AD 2008-09-25 R1](https://openairdocs.org/ad/2008-09-25-R1): Fuel · Bombardier DHC-8-102, DHC-8-103, DHC-8-106 and 5 more. Effective Dec 10, 2009
- [AD 2009-21-03](https://openairdocs.org/ad/2009-21-03): APU full- authority digital controller (FADEC) · Bombardier DHC-8-101, DHC-8-102, DHC-8-103 and 10 more. Effective Nov 20, 2009
- [AD 2009-06-21](https://openairdocs.org/ad/2009-06-21): Fuselage spoiler cable · Bombardier DHC-8-102, DHC-8-103, DHC-8-106 and 8 more. Effective Apr 28, 2009
- [AD 2008-26-03](https://openairdocs.org/ad/2008-26-03): Electronic strike system of the cockpit doo · Cockpit door electro-mechanical strike (Jazz Air STC ST02014NY). Effective Apr 13, 2009
- [AD 2008-13-09](https://openairdocs.org/ad/2008-13-09): Fuel tank bonding jumpers · Bombardier DHC-8-102, DHC-8-103, DHC-8-106 and 5 more. Effective Sep 17, 2008
- [AD 2008-04-17](https://openairdocs.org/ad/2008-04-17): Observer utility light system · Bombardier DHC-8-102, DHC-8-103, DHC-8-106 and 8 more. Effective Apr 3, 2008
- [AD 2007-23-04](https://openairdocs.org/ad/2007-23-04): Elevator spring tab mechanism · Bombardier DHC-8-102, DHC-8-103, DHC-8-106 and 5 more. Effective Dec 11, 2007
- [AD 2007-21-16](https://openairdocs.org/ad/2007-21-16): Spolier cable · Bombardier DHC-8-102, DHC-8-103, DHC-8-106 and 5 more. Effective Nov 21, 2007
- [AD 2007-12-01](https://openairdocs.org/ad/2007-12-01): Main landing gear (MLG) shock strut · Bombardier DHC-8-101, DHC-8-102, DHC-8-103 and 6 more. Effective Jul 10, 2007
- [AD 2007-06-19](https://openairdocs.org/ad/2007-06-19): Main landing gear (MLG) and nose landing gear (NLG) handle assemblies for alternate release and  
 the MLG retaining plate. · Bombardier DHC-8-102, DHC-8-103, DHC-8-106 and 5 more. Effective Apr 27, 2007
- [AD 2007-04-22](https://openairdocs.org/ad/2007-04-22): Electrical cable harness assembly. · Bombardier DHC-8-102, DHC-8-103, DHC-8-106 and 5 more. Effective Apr 3, 2007
- [AD 2007-01-11](https://openairdocs.org/ad/2007-01-11): Flight compartment door · Bombardier DHC-8-101, DHC-8-102, DHC-8-103 and 9 more. Effective Mar 5, 2007
- [AD 2006-20-04](https://openairdocs.org/ad/2006-20-04): Inspection of chain assemblies of elevator trim system · Bombardier DHC-8-102, DHC-8-103, DHC-8-106 and 5 more. Effective Nov 2, 2006
- [AD 2006-17-17](https://openairdocs.org/ad/2006-17-17): Rivets on left and right control column torque tube assemblies · Bombardier DHC-8-102, DHC-8-103, DHC-8-106 and 8 more. Effective Sep 29, 2006
- [AD 2006-17-10](https://openairdocs.org/ad/2006-17-10): Fluorescent light tube assemblies of the cabin, lavatory, and sidewall · Bombardier DHC-8-102, DHC-8-103, DHC-8-106 and 5 more. Effective Sep 27, 2006
- [AD 2005-13-35](https://openairdocs.org/ad/2005-13-35): Flight idle stop · Bombardier DHC-8-101, DHC-8-102, DHC-8-103 and 6 more. Effective Sep 26, 2005
- [AD 2005-13-38](https://openairdocs.org/ad/2005-13-38): Longitudinal skin joints in the fuselage pressure shell · Bombardier DHC-8-101, DHC-8-102, DHC-8-103 and 6 more. Effective Aug 9, 2005
- [AD 2005-11-10](https://openairdocs.org/ad/2005-11-10): Brake shuttle valves · Bombardier DHC-8-102, DHC-8-103, DHC-8-106 and 5 more. Effective Jul 12, 2005

### Matched by engine (Pratt & Whitney Canada PW121)

- [AD 2015-20-03](https://openairdocs.org/ad/2015-20-03): Fuel nozzle and the fuel manifold flow adapter · Pratt & Whitney Canada PW120, PW121, PW121A and 6 more. Effective Nov 18, 2015
- [AD 2012-26-08](https://openairdocs.org/ad/2012-26-08): Propeller shafts · Pratt & Whitney Canada PW118, PW118A, PW118B and 20 more. Effective Feb 15, 2013
- [AD 2006-19-06](https://openairdocs.org/ad/2006-19-06): Propeller shaft · Pratt & Whitney Canada PW118, PW118A, PW118B and 14 more. Effective Sep 29, 2006
- [AD 2003-21-03](https://openairdocs.org/ad/2003-21-03): Low pressure rotor speed (NL) sensor · Pratt & Whitney Canada PW118, PW120, PW120A and 1 more. Effective Nov 20, 2003
- [AD 2003-16-04](https://openairdocs.org/ad/2003-16-04): Fuel heaters · Pratt & Whitney Canada PW118, PW118A, PW118B and 19 more. Effective Sep 10, 2003
- [AD 98-14-02](https://openairdocs.org/ad/98-14-02): Fuel Manifold Transfer Tubes · Pratt & Whitney Canada PW118, PW118A, PW118B and 17 more. Effective Aug 31, 1998
- [AD 97-17-05](https://openairdocs.org/ad/97-17-05): Gas Generator Case Drain Ports · Pratt & Whitney Canada PW118, PW118A, PW118B and 17 more. Effective Sep 9, 1997
- [AD 94-03-02](https://openairdocs.org/ad/94-03-02): High Pressure Turbine Disks · Pratt & Whitney Canada PW118, PW118A, PW120 and 5 more. Effective Feb 16, 1994
- [AD 92-01-08](https://openairdocs.org/ad/92-01-08): High Pressure Rotor · Pratt & Whitney Canada PW118, PW118A, PW120 and 5 more. Effective Jul 27, 1992
- [AD 91-06-02](https://openairdocs.org/ad/91-06-02): Turbomachinery Magnetic Chip Detector · Pratt & Whitney Canada PW118, PW118A, PW120 and 6 more. Effective Mar 29, 1991
- [AD 91-01-03](https://openairdocs.org/ad/91-01-03): Hydromechanical Fuel Control Units · Pratt & Whitney Canada JT15D-5, PW118, PW118A and 3 more. Effective Jan 7, 1991
- [AD 88-26-51](https://openairdocs.org/ad/88-26-51): High Pressure Turbine Components · Pratt & Whitney Canada PW118, PW118A, PW120 and 2 more. Effective Sep 22, 1989

### Historical (superseded or no longer in force)

- [AD 2014-06-08](https://openairdocs.org/ad/2014-06-08) (historical): Landing gear · Bombardier DHC-8-101, DHC-8-102, DHC-8-103 and 6 more. Effective Apr 14, 2014
- [AD 2012-14-04](https://openairdocs.org/ad/2012-14-04) (historical): Landing gear · Bombardier DHC-8-101, DHC-8-102, DHC-8-103 and 6 more. Effective Aug 27, 2012
- [AD 2006-12-16](https://openairdocs.org/ad/2006-12-16) (historical): Structural testing of the cockpit door · Bombardier DHC-8-102, DHC-8-103, DHC-8-106 and 5 more. Effective Jul 18, 2006
- [AD 74-08-09 R2](https://openairdocs.org/ad/74-08-09-R2) (historical): Waste Receptacles · Aero Spacelines 377, 377MG, 377SGT and 268 more. Effective Jul 29, 1996
- [AD 2014-14-02](https://openairdocs.org/ad/2014-14-02) (historical): O-ring seal · Pratt & Whitney Canada PW120, PW121, PW121A and 6 more. Effective Aug 15, 2014
- [AD 2012-11-14](https://openairdocs.org/ad/2012-11-14) (historical): Propeller shafts · Pratt & Whitney Canada PW118, PW118A, PW118B and 20 more. Effective Jul 20, 2012

All 168: https://openairdocs.org/aircraft/N984HA/ads.md

## Information bulletins (advisory)

None matched.

## NTSB investigations

None matched to N984HA.

## FAA accident and incident reports

None matched to N984HA.

## Service difficulty reports (19)

As reported by operators and repair stations. Matched to this aircraft by N-number and event date, checked against the reported serial number, make and model.

- [SDR HNAA2009011200390](https://openairdocs.org/sdr/HNAA2009011200390), Jan 7, 2009: BATTERY. DISCHARGED. LT AFT EMERGENCY LIGHT EXTERIOR LIGHT INOPERATIVE. R&R EMERGENCY LIGHT BATTERY BASE AT 3351 PS3 AT ROW 3. IAW MM 33-51-00.
- [SDR HNAA2009011200391](https://openairdocs.org/sdr/HNAA2009011200391), Jan 7, 2009: BATTERY. DISCHARGED. EMERGENCY CEILING LIGHT INOPERATIVE IN ROW 1 AND ROW 7. R&R LIGHT BATTERY BASE AT 3351 PS3 AT ROW 3 IAW 33-51-00.
- [SDR HNAA2008101600309](https://openairdocs.org/sdr/HNAA2008101600309), Oct 6, 2008: COLLAR. DEBONDED. MINOR PROP VIBRATION NR 1 PROP FELT ON TAXI OUT. CLT MAINT INSPECTED FOUND A BLADE COLLAR DISBONDED. REMOVED BLADE COLLAR HALF PER HAM STAND 61-10-00 DNAA ITEM 
- [SDR HNAA2009012500022](https://openairdocs.org/sdr/HNAA2009012500022), Sep 10, 2008: SEAT TRACK. CORRODED. FORWARD LT INBD SEAT TRACK HAVE SURFACE CORROSION FROM STA X182 TO STA X424.124. FROM STA 182 TO STA 260 FOUND TO BE PREVIOUSLY BLENDED, R&R SEAT TRACK IAW RD8-
- [SDR HNAA2009012500019](https://openairdocs.org/sdr/HNAA2009012500019), Sep 9, 2008: PANEL. CORRODED. STRESS PANEL 623 AT, 522AT, 521AT, 523AT CORROSION FOUND COUNTER SINK HOLES. STRESS PANEL 623AT, 523AT CORROSION REMOVED AND RETREATED 622AT,522 AT OUT OFF LIMI
- [SDR HNAA0800157](https://openairdocs.org/sdr/HNAA0800157), Apr 27, 2008: LINE. LEAKING. HYDRAULIC LINE LEAK IN CABIN PRESSURE VESSEL, OVERHEAD AT ROW 5DF.
- [SDR HNAA0800144](https://openairdocs.org/sdr/HNAA0800144), Apr 27, 2008: HYDRAULIC LINE. CRACKED. HYDRAULIC LEAK AT PSU ROW 5DF. AIRCRAFT RETURNED TO GATE. MX CAPPED LINE OFF. AIRCRAFT FERRIED TO MDT. MX REPLACED NOSE GEAR DOWN LINE.
- [SDR HNAA070245](https://openairdocs.org/sdr/HNAA070245), Oct 17, 2007: SWITCH. FAILED. AFTER TAKEOFF AND GEAR RETRACTED NR 1 ENGINE BETA LOCKOUT SYSTEM ACTIVATED. TORQUE REACHED 98 PERCENT ON INDICATOR, REDUCED TORQUE BY RETARDING POWER AND CONDIT
- [SDR HNAA0600123](https://openairdocs.org/sdr/HNAA0600123), Oct 28, 2006: CIRCUIT BREAKER. NOT CLOSED. AFTER TAKEOFF RUDDER PRESSURE AND RUDDER FULL PRESSURE CAUTION LIGHTS ILLUMINATED FOLLOWED BY NR 1 RUDDER HYDRAULIC CAUTION LIGHT ILLUMINATED. FOUND CIRCUIT BRE
- [SDR HNAA0407104](https://openairdocs.org/sdr/HNAA0407104), Jul 23, 2004: SMOKE DETECTOR. INOPERATIVE. WHILE IN MAINTENANCE IT WAS REPORTED AS THE NR 1 BAGGAGE BAY SMOKE DETECTOR AS BEING INOPERATIVE UPON TEST. MAINTENANCE REMOVED AND REPLACED THE NR 1 SMOKE DETE
- [SDR PCAA0403180](https://openairdocs.org/sdr/PCAA0403180), Mar 6, 2004: COMPUTER. FAULTY. FLIGHT 3893 HAD TO RETURN TO FIELD DUE TO NR 2 ADI AND HSI FAILING ON INITIAL CLIMB. MAINTENANCE REMOVED AND REPLACED NR 2 AHARS COMPUTER AND OPERATIONAL CHECKE
- [SDR PCAA0207071](https://openairdocs.org/sdr/PCAA0207071), Jul 5, 2002: WIRE. DAMAGED. DURING ROUTINE MAINTENANCE VISIT EMERGENCY LIGHT AT AIRSTAIR DOOR EXIT FOUND INOPERATIVE. WIRING REPAIRED AT ATTACH POINT TO TERMINAL IN WARDROBE. OPERATIONAL C
- [SDR HNAA0200017](https://openairdocs.org/sdr/HNAA0200017), Feb 9, 2002: OIL CAP. LOOSE. NR 2 ENGINE LOSS OF OIL PRESSURE. SHUT DOWN NR 2 ENG AT 40 PSI. FOUND OIL AND CAP NOT SECURED COMPLIED WITH INSPECTIONS IAW PWC MM 05-50-00 PG 11-13 ALSO CARD W
- [SDR HNAA000071](https://openairdocs.org/sdr/HNAA000071), Sep 22, 2000: HYDRAULIC LINE. CRACKED. AFTER GEAR SELECTED UP, DURING RETRACTION NR 2 HYDRAULIC PUMP CAUTION LIGHT ILLUMINATED WITH ASSOCIATED LOSS OF QUANTITY. FOUND FLAIR CRACKED ON HYDRAULIC LINE.
- [SDR HNAA9900159](https://openairdocs.org/sdr/HNAA9900159), Nov 16, 1999: UNKNOWN. AFT INTERIOR EMERGENCY LIGHTS INTERMITTENT. REPLACED EMERGENCY LIGHTS BATTERIES, POSITION 5/6 (PS3 AND PS4). OPS. CHECK GOOD.
- [SDR HNAA9900033](https://openairdocs.org/sdr/HNAA9900033), Mar 3, 1999: BATTERY. LOOSE. FIRST AND THIRD OVERHEAD EMERGENCY LIGHTS INOPERATIVE. RESEATED BATTERY IN 3351-PS3. OPERATIONAL CHECK GOOD.
- [SDR HNAA9900028](https://openairdocs.org/sdr/HNAA9900028), Feb 23, 1999: POWER SUPPLY. INOPERATIVE. NUMEROUS INTERIOR AND EXTERIOR EMERGENCY LIGHTS INOPERATIVE. REPLACED 3351-PS2 POWER SUPPLY, OPERATIONAL CHECK GOOD.
- [SDR HNAA9898479](https://openairdocs.org/sdr/HNAA9898479), Nov 13, 1998: GAS STRUT. FAILED. CLT - FLT 3212 - PASSENGER DOOR WILL NOT OPEN ALL THE WAY (HALF WAY). REPLACED AFT GAS STRUT ASSEMBLY. OPERATIONAL CHECK GOOD. (M)
- [SDR 95ZZZX6289](https://openairdocs.org/sdr/95ZZZX6289), Sep 26, 1995: ENGINE. FAILED. BWI/HNP - FLT 3072 - ON FLIGHT 3072 BWI TO HPN, THE CABIN FILLED WITH SMOKE DURING DESCENT. THE AIRCRAFT LANDED IN HPN WITHOUT INCIDENT. FOUND THAT WITH THE BLE

## STCs that may be installed (OpenAirDocs) (146, first 50)

Approved for this aircraft's airframe or engine model, in force first, then newest. The registry doesn't record which STCs an aircraft has; its records do.

### Approved for the airframe (Dehavilland DHC-8-106)

- [STC ST00153IB](https://openairdocs.org/stc/ST00153IB): Installation of Static Line Provisions. Voyageur Aviation Corp
- [STC ST12461IB](https://openairdocs.org/stc/ST12461IB): Installation of Cockpit Voice Recorder with optional RIPS Upgrade. Mid- Canada Mod Center
- [STC ST00197IB](https://openairdocs.org/stc/ST00197IB): Installation of the Universal Quick Access Recorder (uQAR). Flight Data Technologies Inc
- [STC ST04328NY](https://openairdocs.org/stc/ST04328NY): The Manufacture and Installation of Exterior Placards, Labels and Signs is to be performed, installed. Libellule Monde Inc
- [STC ST03875NY](https://openairdocs.org/stc/ST03875NY): Installation of interior placards, signs and markings. Libellule Monde Inc
- [STC SA2622NM](https://openairdocs.org/stc/SA2622NM): Installation of Precise Flight Pulselite Control Unit in landing/taxi system. (767-200 B17) (DHC-8 101). Precise Flight Inc
- [STC ST00030IB](https://openairdocs.org/stc/ST00030IB): Installation of Test Tech ELT. APTOZ EHF
- [STC ST03885AT](https://openairdocs.org/stc/ST03885AT): Installation of an Avionica, Inc. avCM Cellular Module. Aircraft Systems and Manufacturing Inc
- [STC ST04559CH](https://openairdocs.org/stc/ST04559CH): Installation of L3Harris Aviation Products SRVIVR25 Model 7100 Cockpit Voice Recorder (CVR) System. Acron Aviation Inc
- [STC ST03472NY](https://openairdocs.org/stc/ST03472NY): Installation of the Cabin LED Lighting. Avmax Aviation Services Inc
- [STC ST02472AT](https://openairdocs.org/stc/ST02472AT): Installation of a mini Quick Access Recorder (QAR) model MKI, MKII, or MKIII. Aircraft Systems and Manufacturing Inc
- [STC ST03795NY](https://openairdocs.org/stc/ST03795NY): Installation of the TB44 Lithium-Ion Battery System. Avmax Aviation Services Inc
- [STC ST00079IB](https://openairdocs.org/stc/ST00079IB): Integration of Halon-free Portable Fire Extinguisher HAFEX. UMLAUT ENGINEERING GMBH
- [STC ST01909NY](https://openairdocs.org/stc/ST01909NY): Installation of Hawker 9750W0370-6 (24V 43Ah) sealed lead-acid batteries. Securaplane Technologies Inc
- [STC ST02028WI](https://openairdocs.org/stc/ST02028WI): Installation of Bighorn CASEVAC Interior System. Bighorn Airways Inc
- [STC ST03065NY](https://openairdocs.org/stc/ST03065NY): The installation of Dual Universal UNS-1F Flight Management System WAAS Up-grade. Field Aviation East Limited
- [STC ST00215IB](https://openairdocs.org/stc/ST00215IB): Installation of saf-Tglo ECO Photoluminescent Aisle Path Marking Systems. STG AEROSPACE GERMANY GmbH
- [STC ST03424CH](https://openairdocs.org/stc/ST03424CH): Certification of Automatic Dependent Surveillance - Broadcast (ADS-B) Out System with Rockwell Collins TDR-94/-94D Transponders. CMD Flight Solutions LLC
- [STC ST02311AT](https://openairdocs.org/stc/ST02311AT): Installation of Saf-T-Glo Inc photoluminescent floor proximity emergency escape path marking system (FPEEPMS). STG Aerospace Inc
- [STC ST04562NY](https://openairdocs.org/stc/ST04562NY): Installation of saf-Tglo® SuperSeal UltraLite-X (SSUL-X) Photoluminescent Floor Proximity Emergency Escape Path Marking Systems. STG AEROSPACE GERMANY GmbH
- [STC ST00109IB](https://openairdocs.org/stc/ST00109IB): Installation of the Flight Compartment Stowage Box. Infinion Certification Engineering Inc
- [STC ST04788NY](https://openairdocs.org/stc/ST04788NY): Installation of the Terrain Awareness and Warning System. Mid Canada Mod Center
- [STC ST00098IB](https://openairdocs.org/stc/ST00098IB): Introduction of ADS-B Out. STC Twenty One Limited
- [STC ST03354NY](https://openairdocs.org/stc/ST03354NY): Installation of the Dual Auxiliary Air Condintioning system. Field Aviation Company Inc
- [STC ST00886NY](https://openairdocs.org/stc/ST00886NY): Installation of Flight Deck Manual Stowage Box, in accordance with Aero Consulting Services Modification Data Summary Number B78600, Revision H, dated November 9, 2006, or later TCCA approved revision. B/E Aerospace Limited
- [STC ST00015NY](https://openairdocs.org/stc/ST00015NY): Installation of a Sundstrand Turbomach T-62T-40C7B gas turbine auxiliary power unit with a Lear Siegler Model 23088-002 DC starter-generator. Avmax Aviation Services Inc
- [STC ST01689WI](https://openairdocs.org/stc/ST01689WI): Installation of Crane Aerospace & Electronics SmartStem Wireless Tire Pressure Sensing System. ELDEC Corporation
- [STC SA1220NW](https://openairdocs.org/stc/SA1220NW): Installation of Universal flight data recorder. Honeywell International Inc
- [STC SA2916SO](https://openairdocs.org/stc/SA2916SO): Installation of dual TRA-67 Mode S transponder system. Honeywell International Inc
- [STC SA2917SO](https://openairdocs.org/stc/SA2917SO): Installation of CAS-81 TCAS II system. Honeywell International Inc
- [STC ST04667NY](https://openairdocs.org/stc/ST04667NY): Installation of the Honeywell MK VIII Enhanced Ground Proximity Warning System (EGPWS) Override Control. Field Aviation East Limited
- [STC SA9086SC-D](https://openairdocs.org/stc/SA9086SC-D): Recore of Hamilton Standard Heat Exchangers 778683-2 for Installation on deHavilland DHC-8 Series Aircraft and 778683-2 for Installation on Fokker F27 Mark 050 Aircraft, in accordance with Honeywell LORI Sealed Drawing List SDL3545-1, Revision C, dated 11 October 2005 or later FAA approved revision. Honeywell International Inc
- [STC SA9080SC-D](https://openairdocs.org/stc/SA9080SC-D): Replace 30E94-2 Sensing Element in Janitrol Valve 45E04-1 used on DHC-8 Oil Coolers 28E99-6 and 28E99-7 in accordance with Honeywell LORI Specification LR 0201-117 as reflected on Honeywell LORI Sealed Drawing List SDL3709-1, Revision A, dated 11 October 2005 or later FAA approved revision. Honeywell International Inc
- [STC ST04652NY](https://openairdocs.org/stc/ST04652NY): Installation of the ACSS TCAS 7.1. Avmax Aviation Services Inc
- [STC ST02722SE](https://openairdocs.org/stc/ST02722SE): Installation of LT-4098 series Integrated LED Display Panel and/or associated LT-2201 series LED Pushbutton Switches. Luma Technologies LLC
- [STC ST03261NY](https://openairdocs.org/stc/ST03261NY): Installation of Dual Universal UNS-1E Flight Management System WAAS Up-grade. Field Aviation East Limited
- [STC ST04177AT](https://openairdocs.org/stc/ST04177AT): Installation of a Talon Aerospace LED Replacement General Purpose Lamps. Aaxico Technical Services Inc
- [STC ST02448SE](https://openairdocs.org/stc/ST02448SE): Installation of a Supplemental Lighting System. Aviation Specialties Unlimited Inc
- [STC ST02173AK](https://openairdocs.org/stc/ST02173AK): Installation of required equipment for extended overwater operations. Corvus Airlines
- [STC ST00782LA](https://openairdocs.org/stc/ST00782LA): Installation of Chadwick Helmuth Propeller Balance Monitoring System (Vibration Management System II, VMS II). Diagnostic Solution International LLC
- [STC ST01226NY](https://openairdocs.org/stc/ST01226NY): Installation of Environmental Control System Performance Improvement Modification. Cascade Aerospace Inc
- [STC ST10977SC](https://openairdocs.org/stc/ST10977SC): Installation of Dual Universal Avionics Flight Management Systems (FMS) with Global Positioning System (GPS). DAC International Inc
- [STC ST04480NY](https://openairdocs.org/stc/ST04480NY): Installation of the Traffic Collision Avoidance System (TCAS) II Version 7.1 and Elementary Surveillance (ELS) Transponder Upgrade. Genesys Certification Services Inc
- [STC ST02729NY](https://openairdocs.org/stc/ST02729NY): Sky Connect Tracking System to be installed. Honeywell International Inc
- [STC ST04449NY](https://openairdocs.org/stc/ST04449NY): Conversion of DHC-8-102/-103/-106 from passenger carrying aircraft into Package Freighter with a Class E Cargo Compartment. Voyageur Aerotech Inc
- [STC ST04445NY](https://openairdocs.org/stc/ST04445NY): Installation of the Collins TDR-94D Transponder / Traffic Collision Avoidance System (TCAS) 4100 Upgrade. Mid Canada Mod Center
- [STC ST02635LA](https://openairdocs.org/stc/ST02635LA): Modification to replace the existing Mode S Transponder system with the ACSS NXT-600 Mode S Transponder with ADS-B Out. Aviation Communication and Surveillance Systems (ACSS) LLC
- [STC SA01452CH](https://openairdocs.org/stc/SA01452CH): Installation of an air ambulance conversion kit. Med-Pac Inc
- [STC ST04372NY](https://openairdocs.org/stc/ST04372NY): Installation of saf-Tglo® SSUL23 Photoluminescent Aisle Path Marking System. STG Aerospace Ltd
- [STC ST01900WI](https://openairdocs.org/stc/ST01900WI): Heated (LH) Side Canopy Window Assembly replacement installation. Lee Aerospace Inc

All 146: https://openairdocs.org/aircraft/N984HA/stcs.md

## Related

- Other Dehavilland DHC-8-106 aircraft: https://openairdocs.org/model/dehavilland-dhc-8-106/aircraft.md
- The Pratt & Whitney Canada PW121 engine: https://openairdocs.org/engine/pratt-whitney-canada-pw121.md

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