# N404US: Aai Corp DBA Textron Systs UNM AEROSONDE MK 4.7G

- Status: Valid registration
- Airframe: [Aai Corp DBA Textron Systs UNM AEROSONDE MK 4.7G](https://openairdocs.org/model/aai-corp-dba-textron-systs-unm-aerosonde-mk-4-7g) (registry code 061009H)
- Serial number: 4004
- Type: Fixed wing single engine
- Engine type: Reciprocating
- Certificate issued: July 14, 2017
- Expires: July 31, 2027
- Mode S code: A4BD50
- Registered owners: [Aai Corp DBA](https://openairdocs.org/faa-owner/AAI%20CORP%20DBA), [Textron Systems Unmanned Systems](https://openairdocs.org/faa-owner/TEXTRON%20SYSTEMS%20UNMANNED%20SYSTEMS)
- Location: [Hunt Valley, MD](https://openairdocs.org/faa-place/MD/Hunt%20Valley)
- Owner type: Corporation
- Owner's area on the map: 39.5114° N, 76.6909° W: Placed by OpenAirDocs at the center of ZIP code 21030, within about 3 miles (OpenAirDocs). The owner's mailing address, not where the aircraft is based
- FAA registry: https://registry.faa.gov/AircraftInquiry/Search/NNumberResult?nNumberTxt=404US
- Page: https://openairdocs.org/aircraft/N404US

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): 0 in force

### Matched by airframe (Aai Corp DBA Textron Systs UNM AEROSONDE MK 4.7G)

None in force.

## Information bulletins (advisory)

None matched.

## NTSB investigations

None matched to N404US.

## FAA accident and incident reports

None matched to N404US.

## Reports on N404US not matched to an aircraft (1)

They name N404US, but no registry record covers the date, the aircraft registered then was built later, or the report describes another aircraft.

- [Incident 19980630026299I](https://openairdocs.org/incident/19980630026299I), Jun 30, 1998: Boeing 737* (N404US), Ft Lauderdale, FL, Minor damage. (-23) No narrative available.

## Service difficulty reports

None filed for this aircraft. Matched to this aircraft by N-number and event date, checked against the reported serial number, make and model.

## Service difficulty reports on N404US not matched to an aircraft (205, newest 50)

They name N404US, but no registry record covers the date, the aircraft registered then was built later, or the report describes another aircraft.

- [SDR USAA2012073100003](https://openairdocs.org/sdr/USAA2012073100003), Jul 30, 2012: TRIM TAB. DELAMINATED. C3 CHECK - DELAMINATION ON RIGHT AILERON TRIM TAB LOWER SURFACE AT 24 INCHES FROM INBOARD EDGE, AT TRAILING EDGE. REPAIRED RIGHT AILERON TRIM TAB LOWER SURFACE 
- [SDR USAA2012073000026](https://openairdocs.org/sdr/USAA2012073000026), Jul 28, 2012: STRUCTURE. CRACKED. C3 CHECK - CRACK AT HANDLE CUTOUT AFT CARGO DOOR AT BS 827, S22R. REPAIRED AFT CARGO DOOR HANDLE CUTOUT AT BS 827, S22R IAW EA 139968 & B737 SRM 52-00-01 FIG 20
- [SDR USAA2012073000053](https://openairdocs.org/sdr/USAA2012073000053), Jul 23, 2012: HINGE FITTING. CORRODED. C3 CHECK - LEVEL 2 EXFOLIATION CORROSION ON RIGHT AFT LAV SERVICE DOOR AFT HINGE ATTACHMENT AT BS 986. REPLACED RIGHT AFT LAV SERVICE DOOR AFT HINGE ATTACHMENT 
- [SDR USAA2012073000027](https://openairdocs.org/sdr/USAA2012073000027), Jul 23, 2012: SKIN. CRACKED. C3 CHECK - CRACK FUSELAGE SKIN AT BS 873, S25R. REPAIRED FUSELAGE SKIN AT BS 873, S25R IAW B737 SRM 53-00-01-2R-31 D XIX FIG 201.
- [SDR USAA2012073000025](https://openairdocs.org/sdr/USAA2012073000025), Jul 23, 2012: HINGE FITTING. CORRODED. C3 CHECK - LEVEL 2 EXFOLIATION CORROSION ON RIGHT AFT LAV SERVICE DOOR FORWARD HINGE ATTACHMENT AT BS 986. REPLACED RIGHT AFT LAV SERVICE DOOR FORWARD HINGE ATT
- [SDR USAA2012073000024](https://openairdocs.org/sdr/USAA2012073000024), Jul 23, 2012: DRAG ANGLE. CRACKED. C3 CHECK - CRACK ON VERTICAL STABILIZER RIGHT DRAG ANGLE AFT CHANNEL AT FIN STA 52.248. REPAIRED VERTICAL STABILIZER RIGHT DRAG ANGLE AFT CHANNEL AT FIN STA 52.
- [SDR USAA2012073000023](https://openairdocs.org/sdr/USAA2012073000023), Jul 23, 2012: SHEAR TIE. CRACKED. C3 CHECK - CRACK & LEVEL 2 EXFOLIATION CORROSION ON SHEAR ANGLE/CLIP AT BS 867 BETWEEN S28R TO S28L. REPAIRED SHEAR ANGLE/CLIP AT BS 867 BETWEEN S28R TO S28L IA
- [SDR USAA2012041600002](https://openairdocs.org/sdr/USAA2012041600002), Apr 13, 2012: SIGN. UNSECURE. CREW REPORTED THE CABIN EXIT ROW EXIT SIGN, AT OVERWING EXITS, HAS FALLEN OUT OF HOLDER. MAINTENANCE INSTALLED EXIT SIGN.
- [SDR USAA2012032700013](https://openairdocs.org/sdr/USAA2012032700013), Mar 21, 2012: TAB. CRACKED. C2 CHECK - .250 INCH CRACK AT NUT PLATE HOLE ON ROD END FITTING FAIRING OF LEFT AILERON BALANCE TAB AT WBL 444.8. REPLACED LEFT WING AILERON TAB ASSEMBLY IAW JO
- [SDR USAA2012032700012](https://openairdocs.org/sdr/USAA2012032700012), Mar 21, 2012: INTERCOSTAL. CORRODED. C2 CHECK - CORROSION ON INTERCOSTAL CHORD AT BS 270 BETWEEN LBL 11 TO RBL 11. REPAIRED INTERCOSTAL AT BS 270 BETWEEN LBL 11 TO RBL 11 IAW EA 130838.
- [SDR USAA2012021000018](https://openairdocs.org/sdr/USAA2012021000018), Feb 9, 2012: PLACARD. MISSING. MAINTENANCE REPORTED SEAT 11C IS MISSING EXIT PLACARD. MAINTENANCE REPLACED MISSING EXIT PLACARD ON SEAT 11C.
- [SDR USAA2012020600025](https://openairdocs.org/sdr/USAA2012020600025), Feb 2, 2012: UNKNOWN. MALFUNCTIONED. CREW REPORTED THAT AT LIFTOFF IN CLT, THE ENTIRE COCKPIT WENT DARK FOR 3-4 SECONDS. ONCE POWER RESTORED, NO INFORMATION WAS LOST. EVERYTHING WORKED FOR REST OF 
- [SDR USAA2011110700008](https://openairdocs.org/sdr/USAA2011110700008), Nov 6, 2011: SEAT TRACK. LACK OF LUBE. CREW REPORTED THE FIRST OFFICER'S SEAT NEEDS LUBRICATING - THE SLIDES FOR FORWARD AND AFT MOVEMENT. MAINTENANCE LUBRICATED THE FIRST OFFICER'S SEAT TRACKS. CHEC
- [SDR USAA2011082500009](https://openairdocs.org/sdr/USAA2011082500009), Aug 24, 2011: LENS. MISSING. CREW REPORTED SEAT 11C EMERGENCY EXIT LIGHT LENS MISSING. MAINTENANCE REPLACED LENS. OPS CHECK GOOD.
- [SDR USAA2011032991278](https://openairdocs.org/sdr/USAA2011032991278), Mar 19, 2011: FRAME. CORRODED. CLT - Q2 - CORROSION ON FUSELAGE FRAME AT BS 578, RBL 64. REPAIRED FUSELAGE FRAME AT BS 578, RBL 64 IAW EA 102663.
- [SDR USAA2011032991280](https://openairdocs.org/sdr/USAA2011032991280), Mar 17, 2011: FRAME. CORRODED. CLT - Q2 - LEVEL 2 GALVANIC CORROSION ON FUSELAGE FRAME AT BS 847 BETWEEN S27L TO S27R. REPAIRED FUSELAGE FRAME AT BS 847 BETWEEN S27L TO S27R IAW 102726.
- [SDR USAA2011032291171](https://openairdocs.org/sdr/USAA2011032291171), Mar 17, 2011: FRAME. CORRODED. CLT - Q2 - LEVEL 2 EXFOLIATION CORROSION ON FUSELAGE FRAME AT BS 847 BETWEEN S22R TO S24R. REPLACED FUSELAGE FRAME AT BS 847 BETWEEN S22R TO S24R IAW B737 SRM 5
- [SDR USAA2011032291157](https://openairdocs.org/sdr/USAA2011032291157), Mar 17, 2011: FLOOR SUPPORT. CRACKED. CLT - Q2 - CRACK ON AFT CARGO FLOOR SUPPORT BEAM AT BS 727G, S26R. REPLACED AFT CARGO FLOOR SUPPORT BEAM AT BS 727G, S26R IAW B737 SRM 53-00-53.
- [SDR USAA2011032291156](https://openairdocs.org/sdr/USAA2011032291156), Mar 17, 2011: INTERCOSTAL. CRACKED. CLT - Q2 - CRACK ON INTERCOSTAL BETWEEN BS 807 TO BS 827, S27R. REPAIRED INTERCOSTAL BETWEEN BS 807 TO BS 827, S27R IAW EA 102707.
- [SDR USAA2011032291166](https://openairdocs.org/sdr/USAA2011032291166), Mar 16, 2011: FRAME. CRACKED. CLT - Q2 - CRACK ON FUSELAGE FRAME AT BS 380 BETWEEN S20L TO S21L. REPAIRED FUSELAGE FRAME AT BS 380 BETWEEN S20L TO S21L IAW EA 102696.
- [SDR USAA2011032291162](https://openairdocs.org/sdr/USAA2011032291162), Mar 16, 2011: FLOORBEAM. CRACKED. CLT - Q2 - CRACK ON FLOORBEAM WEB BETWEEN BS 707 TO BS 710, BL 0. REPAIRED FLOORBEAM WEB BETWEEN BS 707 TO BS 710, BL 0 IAW EA 102664.
- [SDR USAA2011032291161](https://openairdocs.org/sdr/USAA2011032291161), Mar 16, 2011: FLOORBEAM. CRACKED. CLT - Q2 - CRACK ON FLOORBEAM WEB AT BS 663, BL 0. REPAIRED FLOORBEAM WEB AT BS 663, BL 0. REPLACED FLOORBEAM WEB AT BS 663, BL 0 IAW JOB CARD M2C57002.
- [SDR USAA2011032291160](https://openairdocs.org/sdr/USAA2011032291160), Mar 16, 2011: FLOORBEAM. CRACKED. CLT - Q2 - CRACK ON FLOORBEAM T-CAP AT BS 663, BL 0. REPAIRED FLOORBEAM T-CAP AT BS 663, BL 0 IAW EA 102664.
- [SDR USAA2011031591060](https://openairdocs.org/sdr/USAA2011031591060), Mar 14, 2011: FRAME. CORRODED. CLT - Q2 - MAJOR REPAIR - LEVEL 2 EXFOLIATION CORROSION ON FUSELAGE FRAME AT BS 747, S27R. REPLACED FUSELAGE FRAME SECTION AT BS 747, S27R IAW B737 SRM 53-00-07
- [SDR USAA2011032991276](https://openairdocs.org/sdr/USAA2011032991276), Mar 9, 2011: SKIN. CRACKED. CLT - Q2 - CRACK ON FUSELAGE SKIN AT BS 867 + 3 INCHES, S23R. REPAIRED FUSELAGE SKIN AT BS 867 + 3 INCHES, S23R IAW B737 SRM 53-00-01 REPAIR 31.
- [SDR USAA2011030991009](https://openairdocs.org/sdr/USAA2011030991009), Mar 8, 2011: BEAR STRAP. CRACKED. CLT - Q2 - MAJOR REPAIR - CRACK ON BEAR STRAP AT MAIN ENTRY DOOR UPPER HINGE CUTOUT AT BS 303. REPAIRED BEAR STRAP AT MAIN ENTRY DOOR UPPER HINGE CUTOUT AT BS 3
- [SDR USAA2011032291172](https://openairdocs.org/sdr/USAA2011032291172), Mar 6, 2011: WEB. CORRODED. CLT - Q2 - LEVEL 2 EXFOLIATION CORROSION ON VERTICAL WEB ON LEFT SIDE OF RAM AIR BAY BETWEEN BS 639 TO BS 645, LBL 41. REPAIRED VERTICAL WEB ON LEFT SIDE OF RAM
- [SDR USAA2011030891000](https://openairdocs.org/sdr/USAA2011030891000), Mar 3, 2011: STRUCTURE. CORRODED. CLT - Q2 - MAJOR REPAIR - LEVEL 2 EXFOLIATION CORROSION ON FUSELAGE CHORD AT BS 1121, S12R. REPAIRED FUSELAGE CHORD AT BS 1121, S12R IAW EA 102596.
- [SDR USAA2011022890919](https://openairdocs.org/sdr/USAA2011022890919), Feb 27, 2011: INTERCOSTAL. CORRODED. CLT - MAJOR REPAIR - Q2 CHECK - LEVEL 2 EXFOLIATION CORROSION ON INTERCOSTAL AT BS 927 - BS 947, S21R. REPLACED INTERCOSTAL AT BS 927 - BS 947, S21R. REPLACED I
- [SDR USAA2011022890918](https://openairdocs.org/sdr/USAA2011022890918), Feb 27, 2011: STRINGER CLIP. CORRODED. CLT - MAJOR REPAIR - Q2 CHECK - LEVEL 2 EXFOLAITION CORROSION ON STRINGER TIE CLIP AT BS 927, S21R. REPLACED STRINGER TIE CLIP AT BS 927, S21R IAW B737 SRM 51-1
- [SDR USAA2011022890921](https://openairdocs.org/sdr/USAA2011022890921), Feb 26, 2011: STRINGER. CORRODED. CLT - MAJOR REPAIR - Q2 CHECK - LEVEL 2 EXFOLIATION CORROSION ON STRINGER/CHANNEL AT BS 927, S21R. REPLACED STRINGER/CHANNEL AT BS 927, S21R IAW B737 SRM 53-00-
- [SDR USAA2011022890920](https://openairdocs.org/sdr/USAA2011022890920), Feb 26, 2011: STRINGER. CORRODED. CLT - MAJOR REPAIR - Q2 CHECK - LEVEL 2 EXFOLIATION CORROSION ON STRINGER/CHANNEL AT BS 927, S21R. REPLACED STRINGER/CHANNEL AT BS 927, S21R IAW B737 SRM 53-00-
- [SDR USAA2011022890917](https://openairdocs.org/sdr/USAA2011022890917), Feb 26, 2011: INTERCOSTAL. CORRODED. CLT - MAJOR REPAIR - Q2 CHECK - LEVEL 2 EXFOLIATION CORROSION ON INTERCOSTAL AT BS 927, S21R. REPLACED INTERCOSTAL AT BS 927, S21R IAW B737 SRM 53-00-03.
- [SDR USAA2011030890999](https://openairdocs.org/sdr/USAA2011030890999), Feb 24, 2011: FRAME. CORRODED. CLT - Q2 - MAJOR REPAIR - LEVEL 2 EXFOLIATION CORROSION ON FUSELAGE FRAME AT BS 887 BETWEEN S27L TO S26L. REPAIRED FUSELAGE FRAME AT BS 887 BETWEEN S27L TO S26L
- [SDR USAA2011032291165](https://openairdocs.org/sdr/USAA2011032291165), Feb 22, 2011: FRAME SPLICE. CRACKED. CLT - Q2 - CRACK ON FUSELAGE FRAME SPLICE AT BS 500G, S13R. REPAIRED FUSELAGE FRAME SPLICE AT BS 500G, S13R IAW EA 102614.
- [SDR USAA2011032291170](https://openairdocs.org/sdr/USAA2011032291170), Feb 19, 2011: STIFFENER. CORRODED. CLT - Q2 - LEVEL 2 EXFOLIATION CORROSION ON STIFFENER AT BS 1112 AT APU INLET, RIGHT SIDE AT LOWER FORWARD CORNER. REPLACED STIFFENER AT BS 1112 AT APU INLET, R
- [SDR USAA2011021890800](https://openairdocs.org/sdr/USAA2011021890800), Feb 18, 2011: FLOOR SUPPORT. CORRODED. CLT - MAJOR REPAIR - Q2 CHECK - CORROSION ON FLOOR SUPPORT AT BS 328, S17R. REPLACED FLOOR SUPPORT AT BS 328, S17R IAW B737 SRM 51-40-02.
- [SDR USAA2011021890799](https://openairdocs.org/sdr/USAA2011021890799), Feb 18, 2011: STRINGER CLIP. CRACKED. CLT - MAJOR REPAIR - Q2 CHECK - CRACKED STRINGER TIE CLIP AT BS 344 S11R. REPLACED STRINGER TIE CLIP AT BS 344 S11R IAW B737 SRM 51-10-02.
- [SDR USAA2011021890798](https://openairdocs.org/sdr/USAA2011021890798), Feb 18, 2011: FLOOR SUPPORT. CRACKED. CLT - MAJOR REPAIR - Q2 CHECK - CRACKED FLOOR SUPPORT AT BS 328, LBL 45. REPLACED FLOOR SUPPORT AT BS 328, LBL 45 IAW B737 SRM 51-10-02.
- [SDR USAA2011021890797](https://openairdocs.org/sdr/USAA2011021890797), Feb 18, 2011: ANGLE. CRACKED. CLT - MAJOR REPAIR - Q2 CHECK - CRACKED VERTICAL ANGLE AT BS 727, BL 0. REPLACED VERTICAL ANGLE AT BS 727, BL 0 IAW B737 SRM 51-10-02.
- [SDR USAA2011022890889](https://openairdocs.org/sdr/USAA2011022890889), Feb 15, 2011: STOP FITTING. CRACKED. CLT - MAJOR REPAIR - Q2 CHECK - R2 DOOR STOP FITTING AT BS 332.1, S8R CRACKED. REPLACED R2 DOOR STOP FITTING AT BS 332.1, S8R IAW B737 SRM 51-10-02.
- [SDR USAA2011022890888](https://openairdocs.org/sdr/USAA2011022890888), Feb 15, 2011: SUPPORT ANGLE. CRACKED. CLT - MAJOR REPAIR - Q2 CHECK - R1 DOOR SUPPORT ANGLE CRACKED AT BS 291.5, S10R - S11R. REPLACED R1 DOOR SUPPORT ANGLE AT BS 291.5, S10R - S11R IAW B737 SRM 51-
- [SDR USAA2011021890801](https://openairdocs.org/sdr/USAA2011021890801), Feb 13, 2011: FRAME. CRACKED. CLT - MAJOR REPAIR - Q2 CHECK - CRACKED FRAME AT BS 727D, S8L - S9L. REPAIRED FRAME AT BS 727D, S8L - S9L IAW EA 102619.
- [SDR USAA2011032291167](https://openairdocs.org/sdr/USAA2011032291167), Feb 10, 2011: FRAME. CRACKED. CLT - Q2 - CRACK ON FUSELAGE FRAME AT BS 380 BETWEEN S8L & S9L. REPAIRED FUSELAGE FRAME AT BS 380 BETWEEN S8L & S9L IAW EA 102619.
- [SDR USAA2011021490710](https://openairdocs.org/sdr/USAA2011021490710), Feb 8, 2011: SLAT. CRACKED. CLT - MAJOR REPAIR - Q2 CHECK - RIGHT WING NR 6 SLAT TRAILING EDGE IS CRACKED. REPAIRED RIGHT WING NR 6 SLAT TRAILING EDGE IAW B737 SRM 57-43-01 REPAIR 6.
- [SDR USAA2011021490750](https://openairdocs.org/sdr/USAA2011021490750), Feb 7, 2011: FRAME. CRACKED. CLT - MAJOR REPAIR - Q2 CHECK - CRACKED FRAME AT BS 727B, S8L-S9L. REPAIRED FRAME AT BS 727B, S8L-S9L IAW EA 102619.
- [SDR USAA2011021490709](https://openairdocs.org/sdr/USAA2011021490709), Feb 6, 2011: SLAT. DEBONDED. CLT - MAJOR REPAIR - Q2 CHECK - LEFT WING NR 2 SLAT TRAILING EDGE HAS AREA OF DISBOND. REPAIRED LEFT WING NR 2 SLAT TRAILING EDGE HAS AREA OF DISBOND IAW B737 S
- [SDR USAA2011021890802](https://openairdocs.org/sdr/USAA2011021890802), Feb 4, 2011: SKIN. DELAMINATED. CLT - MAJOR REPAIR - Q2 CHECK - RIGHT WING INBOARD MIDFLAP LOWER SURFACE HAS DELAMINATION AT THE OUTBOARD END. REPAIRED RIGHT WING INBOARD MIDFLAP LOWER SURFACE
- [SDR USAA2011021490711](https://openairdocs.org/sdr/USAA2011021490711), Feb 4, 2011: FLOORBEAM. CORRODED. CLT - MAJOR REPAIR - Q2 CHECK - LEVEL 2 WIDE SPREAD EXFOLIATION CORROSION ON FLOORBEAM T-CAP AT BS 344, LBL 12 - RBL 10. REPAIRED FLOORBEAM T-CAP AT BS 344, LBL
- [SDR USAA2011020990652](https://openairdocs.org/sdr/USAA2011020990652), Feb 3, 2011: SKIN. CRACKED. CLT - MAJOR REPAIR - Q2 CHECK - CRACKED FUSELAGE SKIN AT BS 727F + 8.5, S21L. REPAIRED FUSELAGE SKIN AT BS 727F + 8.5, S21L IAW B737 SRM 53-00-01 REPAIR 31.

All 205: https://openairdocs.org/aircraft/N404US/unmatched-reports.md

## STCs that may be installed (OpenAirDocs)

None matched to this aircraft's models.

## Related

- Other Aai Corp DBA Textron Systs UNM AEROSONDE MK 4.7G aircraft: https://openairdocs.org/model/aai-corp-dba-textron-systs-unm-aerosonde-mk-4-7g/aircraft.md

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