# Service difficulty reports: N311NV

A list on [N311NV](https://openairdocs.org/aircraft/N311NV.md).

Matched to this aircraft by N-number and event date, checked against the reported serial number, make and model. Newest first.

- [SDR WX0A2026091132952](https://openairdocs.org/sdr/WX0A2026091132952.md): Knob · missing · Sep 10, 2026 · N311NV · Airbus A319111 · Emergency Equipment
  > (AIRCRAFT NOT GROUNDED) FWD MEGAPHONE VOLUME KNOB MISSING / R&R MEGAPHONE FWD CABIN IAW AMM REF 25-65-51-02.OPS CHECK PERFORMED,OPS SCHECK GOOD."
- [SDR EE4Y2026230223981](https://openairdocs.org/sdr/EE4Y2026230223981.md): Fitting · damaged · Feb 23, 2026 · N311NV · Airbus A319111 · Fuselage Main, Structure
  > DURING THE EXECUTION OF ALLEGIANT WORK CARD A32X 25-127-005_P1-OP-UP-LF RELATED WITH SB A320-25-1BKJ REV. 04 / AD 2023-05-14 IT WAS FOUND AT THE LOWER FUSELAGE, AVIONICS COMPARTMENT, ELECTRONICS RACK FIN 80VU RH LATERAL LOWER FITTING WITH ELONGATE HOLE. PER C
- [SDR EE4Y2026250223982](https://openairdocs.org/sdr/EE4Y2026250223982.md): Fitting · damaged · Dec 25, 2025 · N311NV · Airbus A320214 · Fuselage Miscellaneous Structure
  > DURING ACCOMPLISHMENT AS PER ALLEGIANT WORK CARD A32X—25-127-005_P1-OP-UP-LF. RELATED WITH SB A320-25-1BKJ REV. 04 / AD 2023-05-14, IT WAS FOUND ON LOWER FUSELAGE AVIONICS AT RACK 80VU UPPER LATERAL FITTING (R/H) OUTBOARD VERTICAL FLANGE WITH ELONGATED HOLE.
- [SDR WX0A2025120332655](https://openairdocs.org/sdr/WX0A2025120332655.md): Cover · missing · Nov 30, 2025 · N311NV · Airbus A319111 · Emergency Lighting
  > (AIRCRAFT NOT GROUNDED) LEAD FA NOTIFIED FLIGHT DECK THAT BOTH L1 AND L2 DOORS MISSING LOWER EXIT LIGHT COVER MISSING. SECURED THE LIGHT COVERS PER SIP. OPS CHECKED GOOD. ACFT OK FOR SERVICE.
- [SDR WX0A2025061832463](https://openairdocs.org/sdr/WX0A2025061832463.md): Cover · broken · Jun 17, 2025 · N311NV · Airbus A319111 · Cabin Equipment/Furnishings
  > (AIRCRAFT NOT GROUNDED) EMERGENCY EQUIPMENT COVER BY L2 DOOR IS BROKEN. / FOUND EMERGENCY EQUIPMENT COVER HINGE PIN PULLED OUT. REINSTALLED PIN REF AMM 25-27-15-400-001-A."
- [SDR WX0A2025061832464](https://openairdocs.org/sdr/WX0A2025061832464.md): Pin · out of position · Jun 16, 2025 · N311NV · Airbus A319111 · Door Warning System
  > (AIRCRAFT NOT GROUNDED) LEFT OVERWING EXIT SLIDE SHOWS DISARMED / FOUND LATCH PIN ON LH AFT EMERGENCY EXIT HATCH RELEASED IN DISARMED POSITION PUT LATCH PIN BACK TO ARMED POSITION IAW A319 AMM 25-62-46-400-001-A STEP 5A(3) OPS CHECK GOOD THIS CLEARS MDDR # 214
- [SDR WX0A2025050232407](https://openairdocs.org/sdr/WX0A2025050232407.md): Lens · broken · May 2, 2025 · N311NV · Airbus A319111 · Emergency Lighting
  > (AIRCRAFT NOT GROUNDED) R2 DOOR EXIT SIGN LENS BROKEN / REMOVED AND REPLACED EXIT SIGN LENS IAW AMM 33-51-13-000/4000-001-A."
- [SDR WX0A2025032432364](https://openairdocs.org/sdr/WX0A2025032432364.md): Oxygen Mask · leaking · Mar 23, 2025 · N311NV · Airbus A319111 · Crew Oxygen System
  > (AIRCRAFT NOT GROUNDED) CREW REPORTS CAPTAIN O2 MASK LEAKING / REMOVED AND REPLACED CAPTAINS O2 MASK IAW AMM 35-12-41-000-002-A AND 35-12-41-400-002-A. OPS CHECK GOOD"
- [SDR WX0A2024070332103](https://openairdocs.org/sdr/WX0A2024070332103.md): Battery · inoperative · Jul 1, 2024 · N311NV · Airbus A319111 · Emergency Equipment
  > (AIRCRAFT GROUNDED) AFT FA MEGAPHONE BATTERY LIGHT NOT FLASHING / REMOVED AND REPLACED BATTERIES ON AFT FA MEGAPHONE IAW AMM 25-65-51-920-001-A. OPS CHECK GOOD."
- [SDR WX0A2024031231973](https://openairdocs.org/sdr/WX0A2024031231973.md): Spring · broken · Mar 8, 2024 · N311NV · Airbus A319111 · Emergency Equipment
  > DOOR ASSIST BOTTLE, SPRING UNDER DEADTIVATION ROD, FOUND BROKEN DURING SLIDE REPLACEMENT. / REMOVED AND REPLACED L-2 DOOR DAMPER/EMERGENCY OPERATION CYLINDER. SEE AMM PRINTED JOB CARDS 52-13-14-400-001-B & 52-13-14-820-002-A FOR WORK ACCOMPLISHED"
- [SDR WX0A2024031231972](https://openairdocs.org/sdr/WX0A2024031231972.md): Slide · none · Mar 8, 2024 · N311NV · Airbus A319111 · Standard Practices/Structures
  > L2 DOOR SLIDE EXPIRED. REQUIRES REPLACEMENT. / REMOVED AND REPLACED L2(7502MM) SLIDE REF A320 AMM 25-62-44-000-002-A AND 25-62-44-400-006-A."
- [SDR EE4Y2024021419450](https://openairdocs.org/sdr/EE4Y2024021419450.md): Frame · out of tolerance · Feb 14, 2024 · N311NV · Airbus A319111 · Fuselage Main, Frame
  > DURING ACCOMPLISHMENT OF ALLEGIANT ENGINEERING ORDER E5311-0019 FR 16 LH DOUBLE JOGGLE AREA AT LEVEL OF DOOR STOP # 7 HOLES # 1 THRU #6,#8,#B,#D AND AT LEVEL OF DOR STOP#1 HOLES #9 THRU #19 WERE FOUND GREATER THAN THE STARTING HOLE DIAMETER FOR COLDWORK PROCES
- [SDR EE4Y2024021419449](https://openairdocs.org/sdr/EE4Y2024021419449.md): Frame · out of tolerance · Feb 14, 2024 · N311NV · Airbus A319111 · Fuselage Main, Frame
  > DURING ACCOMPLISHMENT OF ALLEGIANT ENGINEERING ORDER E5311-0018 FR 16 RH DOUBLE JOGGLE AREA AT LEVEL OF DOOR STOP # 7 HOLES # 1,#2,#4 THRU #8, #A THRU D AND AT LEVEL OF DOR STOP #1 HOLES #9,#10,#12 THRU #19 WERE FOUND GREATER THAN THE STARTING HOLE DIAMETER
- [SDR EE4Y2024021419448](https://openairdocs.org/sdr/EE4Y2024021419448.md): Frame · cracked · Feb 14, 2024 · N311NV · Airbus A319111 · Fuselage Main, Frame
  > DURING ACCOMPLISHMENT OF THE ALLEGIANT TASK 534123-01-2-001 FR 66 RH SIDE INNER CAP JOINTTO GUSSET PLATE AT STGR 10R FOUND FIRST HOLE (FROM UP TO DOWN) WITH CRACK. THE REPAIR WASPERFORMED FOLLOWING THE REPAIR INSTRUCTIONS AS PER A319 SRM 53-41-12-300-018.THE R
- [SDR EE4Y2024021419447](https://openairdocs.org/sdr/EE4Y2024021419447.md): Frame · cracked · Feb 14, 2024 · N311NV · Airbus A319111 · Fuselage, Wing Attach Fittings
  > DURING ACCOMPLISHMENT OF THE ALLEGIANT TASK 534123-01-2-001 FR 66 LH SIDE INNER CAP JOINT TO GUSSET PLATE AT STGR 15L FOUND SECOND HOLE (FROM UP TO DOWN) WITH CRACK. THE REPAIR WAS PERFORMED FOLLOWING THE REPAIR INSTRUCTIONS AS PER A319 SRM 53-41-12-300-018.TH
- [SDR EE4Y2024021419445](https://openairdocs.org/sdr/EE4Y2024021419445.md): Frame · cracked · Feb 14, 2024 · N311NV · Airbus A319111 · Fuselage, Wing Attach Fittings
  > DURING ACCOMPLISHMENT OF THE ALLEGIANT TASK 534123-01-2-001 FR 66 LH SIDE INNER CAP JOINT TO GUSSET PLATE AT STGR 12L FOUND SECOND HOLE (FROM UP TO DOWN) WITH CRACK. THE REPAIR WAS PERFORMED FOLLOWING THE REPAIR INSTRUCTIONS AS PER A319 SRM 53-41-12-300-018.TH
- [SDR EE4Y2024021419444](https://openairdocs.org/sdr/EE4Y2024021419444.md): Frame · cracked · Feb 14, 2024 · N311NV · Airbus A319111 · Fuselage Main, Frame
  > DURING ACCOMPLISHMENT OF THE ALLEGIANT ENGINEERING ORDER E5311-0019, FR 16 AT DOUBLE JOGGLE AREA LH SIDE HOLE # 13 HAS BEEN FOUND WITH CRACK INDICATION.AIRBUS WAS CONTACTED TO REQUEST REPAIR INSTRUCTIONS. AIRBUS PROVIDED REPAIR SOLUTION UNDER DOSSIER 81014204
- [SDR EE4Y2024021419443](https://openairdocs.org/sdr/EE4Y2024021419443.md): Frame · cracked · Feb 14, 2024 · N311NV · Airbus A319111 · Fuselage Main, Frame
  > DURING ALLEGIANT TASK 53-120-003 ACCOMPLISHMENT FR 16 LH CROSSBEAM SPLICING UPPER ROW OF FASTENER HOLE IDENTIFIED AS H2 WITH CRACK WAS FOUND.AIRBUS WAS CONTACTED TO REQUEST REPAIR INSTRUCTIONS. AIRBUS PROVIDED REPAIR INSTRUCTIONS UNDER DOSSIER 81345090. THE RE
- [SDR WX0A2023121131914](https://openairdocs.org/sdr/WX0A2023121131914.md): Epsu · unknown · Dec 6, 2023 · N311NV · Airbus A319111 · Emergency Lighting
  > FAILED EPSU BATTERY AT FIN LOCATION 12WL / R&R EPSU BATTERY AT FIN LOCATION 12 WL IAW AMM REF 33-51-38-000-002-A AND 33-51-38-400-002-A.OPS CHECK PERFORMED,OPS CHECK GOOD."
- [SDR WX0A2023032431741](https://openairdocs.org/sdr/WX0A2023032431741.md): Epsu · unknown · Mar 23, 2023 · N311NV · Airbus A319111 · Emergency Lighting
  > EMERGENCY LIGHTS AND SIGNS ARE INOP AT L1 DOOR AT L1 AND R1 WHILE ON BATTERY POWER / REMOVED AND REPLACED EMERG BATTERY PER AMM 33-51-338-400-002-A"
- [SDR EE4Y2023031017371](https://openairdocs.org/sdr/EE4Y2023031017371.md): Frame · corroded · Mar 10, 2023 · N311NV · Airbus A319111 · Fuselage Main, Frame
  > DURING THE STRUCTURE INSPECTION PER ALLEGIANT ENGINEERING ORDER E5316-0002 REV00 WE FOUND FOUND AT UPPER FUSELAGE FR20, RH SIDE, AT LEVEL OF DOOR STOP #1, FRAME WITH CORROSION. CORRECTIVE ACTION: PERFORMED PERMANENT REPAIR PER AIRBUS INSTRUCTIONS STATED IN COO
- [SDR EE4Y2023031017369](https://openairdocs.org/sdr/EE4Y2023031017369.md): Fitting · cracked · Mar 10, 2023 · N311NV · Airbus A319111 · Fuselage Main, Frame
  > DURING THE STRUCTURE INSPECTION PER ALLEGIANT ENGINEERING ORDER E5316-0002 REV00 WE FOUND FOUND AT UPPER FUSELAGE FR20, RH SIDE, AT LEVEL OF DOOR STOP #1, INTERCOSTAL FITTING WITH CRACKS. CORRECTIVE ACTION: PERFORMED PERMANENT REPAIR PER AIRBUS INSTRUCTIONS ST
- [SDR EE4Y2023031017368](https://openairdocs.org/sdr/EE4Y2023031017368.md): Fitting · cracked · Mar 10, 2023 · N311NV · Airbus A319111 · Fuselage Main, Frame
  > DURING THE STRUCTURE INSPECTION PER ALLEGIANT ENGINEERING ORDER E5316-0002 REV00 WE FOUND AT UPPER FUSELAGE FR16, LH SIDE, AT LEVEL OF DOOR STOP #7, INTERCOSTAL FITTING WITH CRACKS. CORRECTIVE ACTION: PERFORMED PERMANENT REPAIR PER AIRBUS INSTRUCTIONS STATED I
- [SDR WX0A2022070874144](https://openairdocs.org/sdr/WX0A2022070874144.md): Megaphone · none · Jul 6, 2022 · N311NV · Airbus A319111 · Escape Slide
  > FWD MEGAPHONE STUCK ON / REMOVED & REPLACED FWD MEGAPHONE IAW AMM 25-65-51"
- [SDR WX0A2022062074118](https://openairdocs.org/sdr/WX0A2022062074118.md): Megaphone · inoperative · Jun 19, 2022 · N311NV · Airbus A319111 · Escape Slide
  > FA FOWARD MEGAPHONE INOP / REMOVED AND REPLACED FWD MEGAPHOME IAW A319 LOPA, OPS CHECK GOOD, A/C OK FOR SERVICE"
- [SDR WX0A2022061574115](https://openairdocs.org/sdr/WX0A2022061574115.md): Battery · inoperative · Jun 14, 2022 · N311NV · Airbus A319111 · Emergency Lighting
  > CABIN EMER LIGHTS BATTERIES AT POS 11WL, 12WL AND 13WL FAILED CAPACITY TEST DURING TC 335100-03-1-001 / REMOVED AND REPLACED THE CABIN EMER LIGHTS BATTERIES AT 11WL, 12WL, AND 13WL IAW AMM 33-51-38-000-001-A AND 33-51-38-400-001-A. OPS CKS GOOD."
- [SDR WX0A2022032574040](https://openairdocs.org/sdr/WX0A2022032574040.md): Epsu · failed · Mar 25, 2022 · N311NV · Airbus A319111 · Emergency Lighting
  > DURING REPLACEMENT TEST OF THE L/H OFFWING ESCAPE SLIDE GOT BAT/EPSU(13WL)AFT L MESSAGE. / REMOVED AND REPLACED EPSU BATTERY FIN 13WL IAW AMM 33-51-38. OPS CHECK GOOD AT THIS TIME."
- [SDR WX0A2022032574043](https://openairdocs.org/sdr/WX0A2022032574043.md): Door · out of adjust · Mar 23, 2022 · N311NV · Airbus A319111 · Emergency Exits
  > FWD EMER EXIT RIGHT SIDE INDICATED DISARM ON LANDING / FOLLOWED TSM 52-21-00-810-803-A, ADJUSTED TARGET PER AMM 25-23-47 CHECKS GOOD AT THIS TIME."
- [SDR EE4Y2022020515090](https://openairdocs.org/sdr/EE4Y2022020515090.md): Frame · cracked · Feb 5, 2022 · N311NV · Airbus A319111 · Fuselage Structure (General)
  > DESCRIPTION: DURING THE ALLEGIANT E.O. NO: E5316-0002 REV:00 INSPECTIONS AS RELATED TO THE REF. AD: 2019-20-10, ALI: 531103-01-01, SB: 53-1330, IT WAS FOUND INTERCOSTAL FITTINGS WITH CRACK AND FRAME WITH CORROSION ACTION INTERCOSTAL FITTING REPLACED PER
- [SDR EE4Y2022020515089](https://openairdocs.org/sdr/EE4Y2022020515089.md): Frame · cracked · Feb 5, 2022 · N311NV · Airbus A319111 · Fuselage Structure (General)
  > DURING SPECIAL DETAILED INSPECTION ON SERVICE DOOR FRAME FR16 AS PER REF. TASK CARD 531153-02-2-001 INSTRUCTIONS, IT WAS FOUND AT FWD SERVICE DOOR AREA, FR16 BETWEEN STR 10R-11R, FRAME OUTER FLANGE WITH CRACK AT DOOR STOP 7 LEVEL ACTION REPAIR WAS PERFORMED
- [SDR EE4Y2022020515088](https://openairdocs.org/sdr/EE4Y2022020515088.md): Beam · cracked · Feb 5, 2022 · N311NV · Airbus A319111 · Fuselage Structure (General)
  > DURING THE STRUCTURE INSPECTION, IT WAS FOUND THE SIDEBOX BEAM FLANGE AT LH IN S15 FR 43 AREA WITH CRACK ACTION: PERFORMED PERMANENT REPAIR AT THE SIDEBOX BEAM FLANGE AT LH IN S15 FR 43 AREA PER ALLEGIANT EO # E5331-0009 AND E5331-0010. THIS EO, BASED ON SB
- [SDR EE4Y2022020515087](https://openairdocs.org/sdr/EE4Y2022020515087.md): Angle · unknown · Feb 5, 2022 · N311NV · Airbus A319111 · Fuselage Structure (General)
  > PER ALLEGIANT AIR EO 5331-0008 AD 2019-08-07 MODIFICATION REPLACEMENT OF KEEL BEAM TITANIUM ANGLES BETWEEN FR40/42 LH/RH HAS BEEN ACOMPLISHED.
- [SDR EE4Y2022020515086](https://openairdocs.org/sdr/EE4Y2022020515086.md): Skin Panel · corroded · Feb 5, 2022 · N311NV · Airbus A319111 · Fuselage Structure (General)
  > DURING THE STRUCTURE INSPECTION, IT WAS FOUND REAR FUSELAGE PASSENGER/CREW DOOR LH CUT OUT AREA FROM FR68 TO FR69+150MM SILL WITH CORROSION. ACTION: PERFORMED PERMANENT REPAIR AT PAX/CREW DOOR LH LOWER SILL WEB FROM FR68 AND FR68+160MM, +Y 1260 IAW A319 SR
- [SDR EE4Y2022020515085](https://openairdocs.org/sdr/EE4Y2022020515085.md): Skin Panel · corroded · Feb 5, 2022 · N311NV · Airbus A319111 · Fuselage Structure (General)
  > DURING THE STRUCTURE INSPECTION, IT WAS FOUND EXTERNAL LOWER REAR FUSELAGE BETWEEN 150MM AFT OF FR69 AND 200MM OF FR70, STRG 31R AND STRG 32R SKIN WITH CORROSION. ACTION: PERFORMED PERMANENT REPAIR AT REAR FUSELAGE BETWEEN 115MM AFT OF FR69 AND 175MM FWD O
- [SDR WX0A2021122773910](https://openairdocs.org/sdr/WX0A2021122773910.md): Megaphone · failed · Dec 26, 2021 · N311NV · Airbus A319111 · Escape Slide
  > CABIN MEGAPHONE PTT STUCK ON / REMOVED AND REPLACED MEGAPHONE OPS CHECK GOOD REF AMM 25-65-51"
- [SDR WX0A2021072373788](https://openairdocs.org/sdr/WX0A2021072373788.md): Battery Pack · no test · Jul 22, 2021 · N311NV · Airbus A319111 · Emergency Lighting
  > EMERG BATTRY FIN 11WL FAILED CAP TEST OVERTEMP / REMOVED AND REPLACED EMERG BATTERY FIN 11WL IAW A319 AMM 33-51-38 OPS CHECK GOOD"
- [SDR WX0A2021072373787](https://openairdocs.org/sdr/WX0A2021072373787.md): Battery Pack · no test · Jul 22, 2021 · N311NV · Airbus A319111 · Emergency Lighting
  > EMERG BATTERY FIN 10WL FAILED CAP TEST OVERTEMP / REMOVED AND REPLACED EMERG BATTERY FIN 10WL IAW A319 AMM 33-51-38 OPS CHECK GOOD"
- [SDR WX0A2021072373786](https://openairdocs.org/sdr/WX0A2021072373786.md): Battery Pack · no test · Jul 22, 2021 · N311NV · Airbus A319111 · Emergency Lighting
  > EMERG BATTERY FIN 13WL FAILED CAP TEST OVERHEAT / REMOVED AND REPLACED EMERG BATTERY FIN 13WL IAW A319 AMM 33-51-38 OPS CHECK GOOD"
- [SDR WX0A2021072373785](https://openairdocs.org/sdr/WX0A2021072373785.md): Epsu · no test · Jul 22, 2021 · N311NV · Airbus A319111 · Emergency Lighting
  > EMERG BATTERY FIN 12WL FAILED CAP TEST OVERTEMP / REMOVED AND REPLACED EMERG BATTERY FIN 12WL IAW A319 AMM 33-51-38 OPS CHECK GOOD"
- [SDR WX0A2021060773733](https://openairdocs.org/sdr/WX0A2021060773733.md): Sign · broken · Jun 7, 2021 · N311NV · Airbus A319111 · Emergency Lighting
  > CABIN WALL-MOUNTED EMERGENCY LENS EXIT SIGN L/H AFT BROKEN. / REMOVED AND REPLACED EMERGENCY LENS EXIT SING L/H AFT IAW AMM 33-51-13. OPS CHECK GOOD."
- [SDR WX0A2021042373685](https://openairdocs.org/sdr/WX0A2021042373685.md): Epsu · faulted · Apr 22, 2021 · N311NV · Airbus A319111 · Emergency Lighting
  > EPSU BATTERY AT FIN 12 WL FAULT / REMOVED AND REPLACED EPSU BATTERY ON FIN 12WL, OPS CHECK GOOD, W/REF TO AMM 33-51-38 PB 401"
- [SDR WX0A2020052273507](https://openairdocs.org/sdr/WX0A2020052273507.md): Epsu · failed · May 20, 2020 · N311NV · Airbus A319111 · Emergency Lighting
  > EPSU BATTERY FIN# 10WL FAILED EPSU BAT CAP TEST / REPLACED EPSU BATTERY"
- [SDR WX0A2019070373404](https://openairdocs.org/sdr/WX0A2019070373404.md): Megaphone · inoperative · Jul 2, 2019 · N311NV · Airbus A319111 · Emergency Equipment
  > CABIN MEGAPHONE INOP. R&R MEGAPHONE.
- [SDR WX0A2019042673393](https://openairdocs.org/sdr/WX0A2019042673393.md): Megaphone · inoperative · Apr 25, 2019 · N311NV · Airbus A319111 · Emergency Equipment
  > AFT MEGAPHONE INOP / R&R MEGAPHONE"
- [SDR WX0A073243](https://openairdocs.org/sdr/WX0A073243.md): Fan · failed · Apr 11, 2017 · N311NV · Airbus A319111 · Air Distribution Fan
  > VENT EXTRACT FAULT WITH BURNING ELECTRICAL ODOR. R & R AVIONICS EXTRACT FAN.
- [SDR WX0A2016042973145](https://openairdocs.org/sdr/WX0A2016042973145.md): Engine · failed · Apr 28, 2016 · N311NV · Airbus A319111 · Engine (Turbine/Turboprop)
  > NUMBER 2 ENG FAILED DURING GO AROUND. DISCHARGED NR 1 FIRE BOTTLE. R&R NR 2 ENGINE PER T/C 71-400-001. ALL OPS AND LEAK CHECKS GOOD.

## The whole list in SQL

Runs in DuckDB 1.2 or later on the release's Parquet files over HTTPS:

```sql
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 n_number = 'N311NV' AND registry_match = 'registration'
ORDER BY difficulty_date DESC
```

This list as a web page: https://openairdocs.org/aircraft/N311NV/reports

---
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.