# N903TW: 1983 Mcdonnell Douglas DC-9-82(MD-82), registration cancelled 2007-05-10 - Type: Cancelled registration (FAA registry, deregistered aircraft) - Cancelled: May 10, 2007 - Status when cancelled: Triennial form not returned - Airframe: [Mcdonnell Douglas DC-9-82(MD-82)](https://openairdocs.org/model/mcdonnell-douglas-dc-9-82-md-82) (registry code 3022082) - Engine: [Pratt & Whitney JT8D series](https://openairdocs.org/engine/pratt-whitney-jt8d-series) (registry code 52053) - Data sheets: [TCDS A6WE](https://openairdocs.org/tcds/A6WE) (OpenAirDocs) - Serial number: 49154 - Year built: 1983 - Type of aircraft: Fixed wing multi engine - Engine type: Turbo-jet - Airworthiness: Standard, transport - Airworthiness date: May 5, 1983 - Certificate issued: December 2, 2003 - Last registry action: November 21, 2006 - Mode S code: AC7C0F - Owner when cancelled: [American Airlines Inc](https://openairdocs.org/faa-owner/AMERICAN%20AIRLINES%20INC) - Location: [Fort Worth, TX](https://openairdocs.org/faa-place/TX/Fort%20Worth) - Owner type: Corporation - Owner's area on the map: 32.8240° N, 97.0491° W: Placed by OpenAirDocs at the center of ZIP code 76155, within about a mile (OpenAirDocs). The owner's mailing address, not where the aircraft was based - The mark today: https://openairdocs.org/aircraft/N903TW - FAA registry: https://registry.faa.gov/AircraftInquiry/Search/NNumberResult?nNumberTxt=903TW - Page: https://openairdocs.org/deregistered/N903TW-2007-05-10 From the FAA registry file of November 3, 2026, cancelled registrations. Owners' street addresses are left out. The Mode S code belongs to the N-number, not the airframe. ADs and bulletins for the Mcdonnell Douglas DC-9-82(MD-82): https://openairdocs.org/model/mcdonnell-douglas-dc-9-82-md-82.md ## Service difficulty reports (56, newest 50) Matched to this aircraft by N-number and event date, checked against the reported serial number, make and model. - [SDR ZW0A0211301](https://openairdocs.org/sdr/ZW0A0211301), Nov 13, 2002: COALESCER BAG. CONTAMINATED. IRRITATING FUMES WERE OBSERVED IN THE CABIN. REPLACED BOTH WATER SEPARATOR ASSEMBLIES AND PERFORMED PACK BURN OUT. SUSPECT A PREVIOUS APU FUEL LEAK WHICH WAS CO - [SDR TWAA0103704](https://openairdocs.org/sdr/TWAA0103704), Feb 24, 2001: SEAT TRACK. CORRODED. DURING CHECK-C MAINT FOUND CORROSION ON CHAIR TRACK AT STA 1098 TO 1139, SHORT TRACK UNDER FORWARD AFT GALLEY. INSTALLED NEW SECTION OF FLOOR TRACK AT STA 1098 - [SDR TWAA0103702](https://openairdocs.org/sdr/TWAA0103702), Feb 24, 2001: SEAT TRACK. CORRODED. DURING CHECK-C MAINT FOUND CORROSION ON NUMBER 2 CABIN TRACK AT LBL 44 INCHES, STA 1155 TO 1308. REMOVED AND REPLACED TRACK STA 1145 TO 1309. INSTALLED WITH HAR - [SDR TWAA0103703](https://openairdocs.org/sdr/TWAA0103703), Feb 23, 2001: WEB. MISDRILLED. DURING CHECK-C MAINT FOUND IN FWD CABIN MEMBRANE MISDRILLED AT FASTENER HOLE LBL 56 INCHES OTBD SIDE, STA 200 TO 215. REMOVED MISDRILLED MEMBRANE. INSTALLED REP - [SDR TWAA0103701](https://openairdocs.org/sdr/TWAA0103701), Feb 23, 2001: FLOORBEAM. CORRODED. DURING CHECK-C MAINT FOUND FLOORBEAM/CEILING SUPPORT CORRODED ALONG STA 1308, 20 INCHES INBD OF LONGERON 19L. REPAIRED FLOORBEAM AT STA 1308 PER SRM 53-05 FIG 7 - [SDR TWAA0103502](https://openairdocs.org/sdr/TWAA0103502), Feb 22, 2001: WEB. DAMAGED. DURING CHECK-C MAINT FOUND RIVET HOLES ALONG INSIDE EDGE OF MEMBRANE DAMAGED FROM STA 1238 TO 1250, LT SIDE. INSTALLED DOUBLER PER SRM 53-01, PAGE 9 FIG 2 AND S - [SDR TWAA0103317](https://openairdocs.org/sdr/TWAA0103317), Feb 18, 2001: INTERCOSTAL. CORRODED. DURING CHECK-C MAINT FOUND CORROSION ON TOP OF INTERCOSTAL BETWEEN STA 1322 AND 1338, BELOW LONGERON 21L, AND ON 2 ADJACENT INTERCOSTALS BETWEEN STA 1322 AND 13 - [SDR TWAA0103316](https://openairdocs.org/sdr/TWAA0103316), Feb 18, 2001: CARGO TRACK. CORRODED. DURING CHECK-C MAINT IN AFT CARGO COMPT FOUND CORROSION ON UNDERSIDE OF RT TIE DOWN TRACK, BETWEEN STA 1309 AND 1320. REPLACED TRACK PER SPM 6-70-01 PAGE 2 AND - [SDR TWAA0103315](https://openairdocs.org/sdr/TWAA0103315), Feb 17, 2001: CARGO TRACK. CORRODED. DURING CHECK-C MAINT IN THE AFT CARGO COMPT FOUND CORROSION ON RT TIE DOWN TRACK FROM STA 1212 THRU 1320. REPLACED TRACK PER SPM 6-70-01, PAGE 2 AND 3 AND DRAWI - [SDR TWAA0103314](https://openairdocs.org/sdr/TWAA0103314), Feb 16, 2001: FLOOR SUPPORT. CORRODED. DURING CHECK-C MAINT IN THE FWD CABIN FOUND CORROSION ON FLOOR SUPPORT AT STA 200, LBL 8 INCHES. INSTALLED NEW FLOOR SUPPORT PER DRAWING 9936534. INSTALLED FAST - [SDR TWAA0103313](https://openairdocs.org/sdr/TWAA0103313), Feb 16, 2001: CARGO TRACK. CORRODED. DURING CHECK-C MAINT FOUND HEAVY CORROSION IN FWD CARGO COMPT ON RT TIE DOWN TRACK, STA 332 TO 370. REMOVED CORROSION PER SRM 51-10-3 PAGE 21 PARA 35. FABRICATE - [SDR TWAA0103312](https://openairdocs.org/sdr/TWAA0103312), Feb 16, 2001: INTERCOSTAL. CORRODED. DURING CHECK-C MAINT FOUND 4 INTERCOSTALS UNDER THE MEMBRANE AT STA 160 TO 200, LBL 55 INCHES, WERE CORRODED. REMOVED LIGHT CORROSION FROM INTERCOSTAL AT STA 17 - [SDR TWAA0103311](https://openairdocs.org/sdr/TWAA0103311), Feb 16, 2001: WEB. CORRODED. DURING CHECK-C MAINT IN THE FWD CABIN, FOUND CORROSION ON FLOOR PAN AT STA 160 TO 169, LBL 9 INCHES. INSTALLED REPAIR PER SRM 51-70-4. INSTALLED FASTENERS PER S - [SDR TWAA0103310](https://openairdocs.org/sdr/TWAA0103310), Feb 16, 2001: CARGO TRACK. CORRODED. DURING CHECK-C MAINT IN THE AFT CARGO COMPT THE RT FLOOR TIE DOWN TRACK HAD CORROSION INSIDE OF TRACK FROM STA 1008 TO 1155. REMOVED TRACK AND REPLACED WITH NEW - [SDR TWAA0103309](https://openairdocs.org/sdr/TWAA0103309), Feb 16, 2001: SUPPORT BRACKET. CORRODED. DURING CHECK-C MAINT IN MID CARGO COMPT, FOUND CORROSION ON TRACK SUPPORT RT SIDE STA 598 TO 642. REMOVED TRACK SUPPORT AND FABRICATED NEW PER SRM 53-24-0, PAGE - [SDR TWAA0103307](https://openairdocs.org/sdr/TWAA0103307), Feb 15, 2001: FLOOR SUPPORT. CORRODED. DURING CHECK-C MAINT IN FWD CABIN FOUND CORROSION AT STA 180, LBL 13 INCHES TO 38 IN, ON FLOOR SUPPORT TOP AND UNDERSIDE. REPLACED FLOOR SUPPORT. REMOVED RIVETS - [SDR TWAA0103306](https://openairdocs.org/sdr/TWAA0103306), Feb 14, 2001: FLOOR SUPPORT. CORRODED. DURING CHECK-C MAINT A CABIN FLOOR PANEL MOUNT HAD CORROSION ON AFT EDGE OF FLOOR PANEL MOUNT, STA 1174, FLOOR PANEL NUMBER 85. FABRICATED NEW FLOOR SUPPORT PER - [SDR TWAA0103103](https://openairdocs.org/sdr/TWAA0103103), Feb 14, 2001: FLOOR SUPPORT. CORRODED. DURING CHECK-C MAINT, THE RT SIDE FWD CABIN DOOR AREA, FLOOR SUPPORT AT STA 172, 18 INCHES TO RT OF BL 0, WAS CORRODED. REPLACED FLOOR SUPPORT PER SPM 6-70-01. - [SDR TWAA0103007](https://openairdocs.org/sdr/TWAA0103007), Feb 13, 2001: FRAME. CORRODED. DURING CHECK-C MAINT IN THE AFT CARGO COMPT, STA 1309, LONGERON 28R, THE FORMER REPAIR WAS CORRODED. FABRICATED NEW SPLICE PER SPM 6-70-01. INSTALLED REPAIR AND - [SDR TWAA0103006](https://openairdocs.org/sdr/TWAA0103006), Feb 13, 2001: FLOOR SUPPORT. CORRODED. DURING CHECK-C MAINT FOUND CABIN FLOOR SUPPORT CORRODED AT STA 160 TO 200, RBL 52 INCHES. REPLACED FLOOR SUPPORT AT STA 160 TO 200 PER SPM 6-70-01. INSTALLED FA - [SDR TWAA0103005](https://openairdocs.org/sdr/TWAA0103005), Feb 13, 2001: FLOOR SUPPORT. CORRODED. DURING CHECK-C MAINT THE RT SIDE FWD DOOR AREA, FWD GALLEY DRAIN PAN FLOOR SUPPORT HAD CORROSION. REPLACED OUTBOARD FLOOR SUPPORT PER SPM 6-70-01. INSTALLED FAS - [SDR TWAA0103004](https://openairdocs.org/sdr/TWAA0103004), Feb 13, 2001: PAN. CORRODED. DURING CHECK-C MAINT AT THE RT SIDE FWD CABIN DOOR AREA, THE MEMBRANE AROUND AND UNDER THE FWD GALLEY DRAIN PAN HAD CORROSION. REMOVED CORROSION PER SPM 6-80-01 - [SDR TWAA0103308](https://openairdocs.org/sdr/TWAA0103308), Feb 12, 2001: SEAT TRACK. CORRODED. DURING CHECK-C MAINT IN CABIN FWD END OF TRACK AT RBL 24 INCHES HAD CORROSION GROUND BEYOND LIMITS AT STA 200. REMOVED CORROSION PER SPM 6-80-01. REPAIRED TRACK - [SDR TWAA0102813](https://openairdocs.org/sdr/TWAA0102813), Feb 12, 2001: FLOORBEAM. CORRODED. DURING CHECK-C MAINT IN THE RT SIDE NUMBER 1 CABIN DOOR AREA, FOUND FLOOR SUPPORT AT STA 200 WITH CORROSION, RBL 44 TO 54. REPLACED FLOOR SUPPORT PER SPM 6-70-0 - [SDR TWAA0102812](https://openairdocs.org/sdr/TWAA0102812), Feb 12, 2001: FLOOR SUPPORT. CORRODED. DURING CHECK-C MAINT FOUND CORROSION ON CABIN FLOOR SUPPORT AT STA 148 TO 200, RBL 5 INCHES. REPLACED FLOOR SUPPORT PER SPM 6-70-01. INSTALLED FASTENERS PER SRM - [SDR TWAA0102811](https://openairdocs.org/sdr/TWAA0102811), Feb 12, 2001: LONGERON. CORRODED. DURING CHECK-C MAINT FOUND CORROSION INSIDE LONGERON 24L, BETWEEN STA 1193 AND 1212. REPLACED LONGERON SPLICE WITH NEW SPLICE. SEALED PART FOR INSTALLING PER SR - [SDR TWAA0102810](https://openairdocs.org/sdr/TWAA0102810), Feb 11, 2001: FLOOR SUPPORT. CORRODED. DURING CHECK-C MAINT FOUND CORROSION ON FLOOR SUPPORT AT STA 160 TO 200, RBL 44 INCHES. REPLACED FLOOR SUPPORT PER SPM 6-70-01. INSTALLED FASTENERS PER SRM 51-3 - [SDR TWAA0102809](https://openairdocs.org/sdr/TWAA0102809), Feb 11, 2001: FLOORBEAM. CORRODED. DURING CHECK-C MAINT FOUND CORROSION ON CABIN FLOOR SUPPORT AT STA 200 FROM BLR AND ON TO APPROX 37 INCHES. REPLACED FLOOR SUPPORT PER SPM 6-70-01. INSTALLED FA - [SDR TWAA0102808](https://openairdocs.org/sdr/TWAA0102808), Feb 11, 2001: GALLEY TRACK. CORRODED. DURING CHECK-C MAINT FOUND CORROSION AT FWD GALLEY HOLD DOWN SUPPORT AT STA 160, BLR 38 IN. REPLACED GALLEY TIE DOWN PER SRM 6-70-01. INSTALLED FASTENERS PER SR - [SDR TWAA0102807](https://openairdocs.org/sdr/TWAA0102807), Feb 8, 2001: SEAT TRACK. CORRODED. DURING CHECK-C MAINT FOUND CORROSION IN THE NUMBER 1 CABIN CHAIR TRACK, STA 1118. REPLACED NUMBER 1 CHAIR TRACK FROM STA 1030 TO 1136 PER SPM 6-70-01. REPLACED - [SDR TWAA0102707](https://openairdocs.org/sdr/TWAA0102707), Feb 7, 2001: CARGO TRACK. CORRODED. DURING CHECK-C IN THE FWD CARGO COMPT, THE LT TIE DOWN TRACK AT STA 541 WAS CORRODED. SPLICED IN NEW CARGO TRACK PER SRM 53-05, FIG 4G, PAGE 10R. PAINTED PER SR - [SDR TWAA0102415](https://openairdocs.org/sdr/TWAA0102415), Feb 6, 2001: FLANGE. DAMAGED. DURING CHECK-C MAINT THE FORWARD CARGO DOOR FLANGE AREA UNDER THE CAM LOCK HAD A FIELD REPAIR, ON AFT SIDE. REMOVED OLD REPAIR AND INSTALLED REPAIR PER SRM 52-0 - [SDR TWAA0102412](https://openairdocs.org/sdr/TWAA0102412), Feb 6, 2001: STOP. CRACKED. DURING CHECK-C MAINT FWD CARGO DOOR, TOP AFT EXTERNAL STOP AND LOWER FWD EXTERNAL STOP, HAD CRACKED ATTACH BRACKETS. INSTALLED NEW BRACKETS AND FASTENERS PER SR - [SDR TWAA0102416](https://openairdocs.org/sdr/TWAA0102416), Feb 5, 2001: FLANGE. CRACKED. DURING CHECK-C MAINT ON THE AFT CARGO DOOR, THE FLANGE AREA UNDER THE AFT CAMLOCK WAS CRACKED. STOP DRILLED AND INSTALLED REPAIR DOUBLER PER SRM 52-05, FIG 26A. - [SDR TWAA0102414](https://openairdocs.org/sdr/TWAA0102414), Feb 4, 2001: SEAT TRACK. CORRODED. DURING CHECK-C MAINT FOUND HEAVY CORROSION ON NUMBER 3 CHAIR TRACK, LBL 22 INCHES, STA 1088 TO 1308. REMOVED AND REPLACED CHAIR TRACK WITH STOCK PART AT STA 108 - [SDR TWAA0102413](https://openairdocs.org/sdr/TWAA0102413), Feb 4, 2001: BRACKET. CORRODED. DURING CHECK-C MAINT ON RT WING THE AFT RT END OF KEEL BEAM BOX HAD CORROSION ON DUCT BRACKET. REMOVED AND REPLACED ANGLE PER SPM 6-70-01 USING DRAWING 5936395 - [SDR TWAA0102411](https://openairdocs.org/sdr/TWAA0102411), Feb 2, 2001: FLOOR SUPPORT. CORRODED. DURING CHECK-C MAINT FOUND 2 CABIN FLOOR SUPPORTS BETWEEN STA 1182 AND 1250, AND BETWEEN CHAIR TRACKS 2 AND 3, WERE CORRODED. INSTALLED NEW FLOOR SUPPORTS PER S - [SDR TWAA0102305](https://openairdocs.org/sdr/TWAA0102305), Jan 30, 2001: BRACKET. CRACKED. DURING CHECK-C MAINT IN THE FWD CARGO COMPT BILGE, STA 237, BETWEEN LONGERON 29R AND 28R, ANGLE BRACKET WAS CRACKED IN RADIUS IN INTERCOSTAL AFT END UNDER TIE D - [SDR TWAA0102304](https://openairdocs.org/sdr/TWAA0102304), Jan 30, 2001: FRAME. DAMAGED. DURING CHECK-C MAINT IN THE AFT ACCY COMPT, FORMER RING WAS DAMAGED AT STA 1418, LONGERON 13R. REPAIRED FORMER PER SRM 53-03, FIG 4. INSTALLED FASTENERS PER SRM - [SDR TWAA0102303](https://openairdocs.org/sdr/TWAA0102303), Jan 30, 2001: SHEAR TIE. CRACKED. DURING CHECK-C MAINT AT THE AFT ACCY COMPT, STA 1418, BETWEEN LONGERON 13R AND 14R, THE FORMER FOOT WAS CRACKED. REPLACED FORMER FOOT PER SPM 6-70-01. INSTALLED - [SDR TWAA0102302](https://openairdocs.org/sdr/TWAA0102302), Jan 30, 2001: SKIN. MISREPAIRED. DURING CHECK-C MAINT, A RT WING L/E BLIND RIVET REPAIR WAS FOUND INSTALLED ON L/E LOWER SURFACE AT INBOARD END OF FUEL SERVICE PANEL, STA X05250. REMOVED OLD RE - [SDR TWAA0102814](https://openairdocs.org/sdr/TWAA0102814), Jan 12, 2001: WEB. CORRODED. DURING CHECK-C MAINT FOUND THE RT SIDE NUMBER 1 CABIN DOOR AREA, WITH CORROSION ON MEMBRANE AT STA 180 TO 200, BL 0 TO RBL 35 INCHES. SEVERAL PLACES. CORROSION - [SDR TWAA0008411](https://openairdocs.org/sdr/TWAA0008411), May 29, 2000: SLIDE. DEPLOYED. DURING OVERNIGHT LAYOVER, THE TAIL SLIDE WAS DEPLOYED. SLIDE NOT DISARMED BY FLIGHT ATTENDANT. REPLACED SLIDE ASSEMBLY. AC02 5-2-00 JFK. - [SDR TWAA0003001](https://openairdocs.org/sdr/TWAA0003001), Feb 22, 2000: CONNECTOR. DISCONNECTED. THE LEFT AND RIGHT EMERGENCY EXIT LIGHTS WERE INOPERATIVE. RECONNECTED CONNECTOR R5-1314 IN THE FWD CARGO COMPT SIDEWALL. CHECK-C 10-25-99 JFK. - [SDR TWAA9916101](https://openairdocs.org/sdr/TWAA9916101), Nov 23, 1999: SENSOR. OUT OF ADJUST. AFTER TAKEOFF, NOSE GEAR RED LIGHT WAS ON. CYCLED THE GEAR AND THE LIGHT WENT OUT BRIEFLY THEN CAME BACK ON. WENT OUT AFTER 2 HRS OF FLIGHT AND STAYED OUT. ADJU - [SDR TWAA9714601](https://openairdocs.org/sdr/TWAA9714601), Dec 12, 1997: POTENTIOMETER. WORN. JFK - FLT 30 - DURING CRUISE, FIRST OFFICER'S MAP LIGHT SWITCH SHORTED OUT. SLIGHT ODOR AND SMOKE DETECTED. POTENTIOMETER MOUNTING WAS RESECURED. MFG P/N 62412. - [SDR TWAA9809603](https://openairdocs.org/sdr/TWAA9809603), Dec 9, 1997: BULKHEAD. CRACKED. MCI - DUIRNG MAINTENANCE CHECK, FOUND LT BULKHEAD OTBD OF LT TRUNNION, 3 INCHES FORWARD, HAD 3 INCH CRACK. CUT OUT CRACK AND INSTALLED DOUBLER PER SRM 53-05, PA - [SDR TWAA9809602](https://openairdocs.org/sdr/TWAA9809602), Dec 9, 1997: SKIN. GOUGED. MCI - DURING MAINTENANCE CHECK, FOUND FUSELAGE DAMAGE AT STA 204, L22R. GROOVE IN SKIN 2.5 INCHES LONG BY 1.8 INCHES BY .200 INCH DEEP. INSTALLED REPAIR PER SRM - [SDR TWAA9809513](https://openairdocs.org/sdr/TWAA9809513), Dec 9, 1997: SKIN. DENTED. MCI - DURING MAINTENANCE WORK, FOUND DENT IN FUSELAGE SKIN 1.5 INCH IN DIAMETER BY .140 INCH DEEP AT STA 194, L234. INSTALLED REPAIR PER SRM 53-04, PAGE 39. ACF - [SDR TWAA9805803](https://openairdocs.org/sdr/TWAA9805803), Dec 9, 1997: SKIN. DENTED. MCI - DURING MODIFICATION VISIT, FOUND FUSELAGE DAMAGE AT STATION 200 BETWEEN LONGERON 22R AND 23R. TWO DENTS WERE FOUND, AFT DENT 2.5 INCH DIAMETER BY .100 INC All 56: https://openairdocs.org/deregistered/N903TW-2007-05-10/reports.md ## NTSB investigations (1) From the NTSB's public API. Aircraft are matched to registry aircraft by N-number and event date, checked against the reported serial number, make and model; the registry's history has gaps, so older matches can be wrong. Compare the reported make and model. - [NTSB MKC84IA017](https://openairdocs.org/ntsb/MKC84IA017), Nov 8, 1983: Mcdonnell Douglas DC9-80 (N903TW), St. Louis, MO, incident, minor damage ## FAA accident and incident reports (6) From the FAA Accident/Incident Data System. Reports are matched to registry aircraft by N-number and event date, checked against the reported make and model; the registry's history has gaps, so older matches can be wrong. Compare the reported make and model. - [Incident 19900228009589I](https://openairdocs.org/incident/19900228009589I), Feb 28, 1990: Doug DC982 (N903TW), St Louis, MO. Compressor stall after departure. Shut down engine and landed. Engine turbine had failed. - [Incident 19880602038889I](https://openairdocs.org/incident/19880602038889I), Jun 2, 1988: Doug DC982 (N903TW), St Louis, MO. Left fire warning came on. When power reduced warning stopped. Found nose cowl anti ice duct cracked. Replaced. - [Incident 19860430033199I](https://openairdocs.org/incident/19860430033199I), Apr 30, 1986: Doug DC982 (N903TW), St Louis, MO. Tail cone assembly found on runway after landing. Cause undetermined. - [Incident 19850723038709I](https://openairdocs.org/incident/19850723038709I), Jul 23, 1985: Doug DC982 (N903TW), St Louis, MO. Lost hydraulic fluid with flap extension on descent. Found broken line at thrust reverser control valve. - [Incident 19841022060319I](https://openairdocs.org/incident/19841022060319I), Oct 22, 1984: Doug DC980 (N903TW), St Louis, MO. Aircraft landed with unsafe nose gear indication. Nose gear proximity computer inoperative. P/n 930683. - [Incident 19831108069079I](https://openairdocs.org/incident/19831108069079I), Nov 8, 1983: Doug DC980 (N903TW), St Louis, MO, Minor damage. Lost tail cone on landing roll out. Dropped by activation of the pressure bulkhead door emergency exit mechanisms. ## Other aircraft with N903TW - [Registered now](https://openairdocs.org/aircraft/N903TW): Raytheon B200, S/N BB-1822 --- OpenAirDocs.org is an independent research project of [Contrail Labs](https://contraillabs.com/). It is not affiliated with the FAA or the NTSB. Source documents are U.S. government works in the public domain.