AIM ¶ 5-6-6 — Civil Aircraft U.S. Airspace
AIM 5-6-6 explains rules for civil aircraft operating in U.S. territorial airspace, including weight thresholds, special interest countries, and TSA requirements.
In Plain English
AIM 5-6-6 outlines how civil aircraft may legally operate within U.S. territorial airspace, with rules that depend on aircraft weight, country of registry, and operator status.
- Light aircraft (≤100,309 lbs / 45,500 kg): May operate per all applicable regs and VFR in airport traffic patterns near the U.S. border, with limited exceptions.
- Aircraft from State Department-designated special interest countries (or using a 3LD from such a country) must follow the same rules as heavy aircraft, unless they hold valid FAA Part 129 operations specifications.
- Heavy aircraft (>100,309 lbs / 45,500 kg) must:
- File and be on an active flight plan (IFR or VFR)
- Have an operational transponder with altitude reporting and squawk an assigned code
- Have ADS-B Out where required by 14 CFR 91.225
- Maintain two-way radio communications with ATC
- If foreign-registered, operate under a TSA aviation security program or an FAA/TSA airspace waiver
- Obtain an FAA routing authorization if from a special interest country (VFR/DVFR prohibited)
An exception exists for foreign-registered aircraft on maintenance, production, or acceptance test flights when a U.S. company has operational control, an FAA-certificated PIC is flying, only crew are aboard, and "Maintenance Flight" is noted in the flight plan remarks. This guidance helps pilots and operators understand what's required before entering U.S. airspace from abroad.
AIM Source Text
FAA AIM ¶ 5-6-65-6-6. 5-6-6. Civil Aircraft Operations Within U.S. Territorial Airspace
Civil aircraft with a maximum certificated takeoff gross weight less than or equal to 100,309 pounds (45,500 kgs) are authorized to operate within U.S. territorial airspace in accordance with all applicable regulations and VFR in airport traffic pattern areas of U.S. airports near the U.S. border, except for those described in subparagraph 5-6-6 b below. Civil aircraft with a maximum certificated takeoff gross weight less than or equal to 100,309 pounds (45,500 kgs) and registered in a U.S. State Department-designated special interest country or operating with the ICAO 3LD of a company in a country listed as a U.S. State Department-designated special interest country, unless the operator holds valid FAA part 129 operations specifications, must operate within U.S. territorial airspace in accordance with the same requirements as civil aircraft with a maximum certificated takeoff gross weight greater than 100,309 pounds (45,500 kgs), as described in subparagraph 5-6-6 c below. Civil aircraft with a maximum certificated takeoff gross weight greater than 100,309 pounds (45,500 kgs) are authorized to operate within U.S. territorial airspace if in compliance with all of the following conditions: File and are on an active flight plan (IFR or VFR); Equipped with an operational transponder with altitude reporting capability, and continuously squawk an ATC assigned transponder code; Equipped with an operational ADS-B Out when operating in airspace specified in 14 CFR 91.225; Maintain two-way radio communications with ATC; Aircraft not registered in the U.S. must operate under an approved Transportation Security Administration (TSA) aviation security program (see paragraph 5-6-10 for TSA aviation security program information) or in accordance with an FAA/TSA airspace waiver (see paragraph 5-6-9 for FAA/TSA airspace waiver information), except as authorized in 5-6-6 c 7 . below; Are in receipt of, and are operating in accordance with an FAA routing authorization and an FAA/TSA airspace waiver if the aircraft is registered in a U.S. State Department-designated special interest country or is operating with the ICAO 3LD of a company in a country listed as a U.S. State Department-designated special interest country, unless the operator holds valid FAA part 129 operations specifications. VFR and DVFR flight operations are prohibited for any aircraft requiring an FAA routing authorization. (See paragraph 5-6-11 for FAA routing authorization information.); and Aircraft not registered in the U.S., when conducting post-maintenance, manufacturer, production, or acceptance flight test operations, are exempt from the requirements in 5-6-6 c 5 above if all of the following requirements are met: A U.S. company must have operational control of the aircraft; An FAA-certificated pilot must serve as pilot in command; Only crewmembers are permitted onboard the aircraft; and “Maintenance Flight” is included in the remarks section of the flight plan.
Oral Exam Questions a DPE Might Ask
Q1What is the weight threshold that determines stricter operating requirements for civil aircraft in U.S. territorial airspace?
Per AIM 5-6-6, civil aircraft with a maximum certificated takeoff gross weight greater than 100,309 pounds (45,500 kg) must comply with the stricter set of operating conditions, including filing a flight plan, transponder/ADS-B Out, and two-way ATC communications.
Q2What additional requirement applies to aircraft registered in a U.S. State Department-designated special interest country?
Per AIM 5-6-6, such aircraft (or those operating under a 3LD from such a country) must operate under an FAA routing authorization and an FAA/TSA airspace waiver, and VFR/DVFR operations are prohibited—unless the operator holds valid FAA Part 129 operations specifications.
Q3Under what conditions can a foreign-registered aircraft conduct a maintenance test flight in U.S. airspace without a TSA security program or airspace waiver?
Per AIM 5-6-6, the exemption applies if a U.S. company has operational control, an FAA-certificated pilot serves as PIC, only crewmembers are onboard, and "Maintenance Flight" is included in the flight plan remarks.
Related Paragraphs in AIM Chapter 5