SourceOne Aviation Compliance provides applications for the following FAA LOA’s /OpSpecs/MSpecs and also SFAR77 for meeting the requirements associated with each authorization. Additional regulatory information is documented in FAA Order 8900.1, Volume 3, Chapter 18. This document is available at:

FSIMS FAA LOA /OPSPEC/MSPEC Guide.

Note that the requirements in the Ops Specs include operator and crew training requirements and authorizations. In keeping with the definition in Doc. 4444, remember that to file the indicated capability in a flight plan you must have:

• presence of relevant operational Communication Navigation and Surveillance equipment, to include the appropriate number of units on board the aircraft to meet airspace requirements;
• Equipment and capabilities commensurate with flight crew qualifications; and
• where applicable, authorization from the appropriate authority.

Note 1: Effective 01/22/2019 – the Domestic US only does not require FAA LOA/OpSpec B046/D092 for ADS-B Out Certified Aircraft, and LOA/OpSpec B046/D092 is still required for international flight operations for ICAO States that require formal FAA approval.

Note 2: B036 provides the basic requirements for RNP10/RNP4/RNP2 using dual Long Range Navigation Systems installed and operational. Additional Ops Specs are required depending on the airspace to be flown:

Central East Pacific (CEP): B037

North Pacific (NOPAC): B038

Areas of magnetic unreliability: B040

North Polar: B055

Other Areas: Check B050 for applicability

Note 3: B054 provides the requirements for RNP 10 using a single Long Range Navigation System in the limited areas defined such as GoMex.

14 CFR 135 Serialized or Fleet MEL: OpSpec D095

Serialized (Serial Number/N-Number Specific) MEL: D095

Serialized (Serial Number/N-Number Specific) MEL: D195