• MC 02-19 Addendum to the Memorandum Circular 26-18 Dated 7 September 2018 (Re: Required Minimum Number of Aircraft for the Issuance of Air Operator Certificate)
• MC 05-19 Aircraft Reweighing
• MC 08-19 Alcohol Check on ramp Inspection to be Conducted by Japan Civil Aviation Bureau for Foreign Airlines Operating in Japan
• MC 11-19 Amendment to PCAR Part 8.6.2.2 Adequacy of Operating Facilities in Compliance with ICAO Annex 6 Part I
• MC 12-19 Amendments to the Philippine Civil Aviation Regulations Part 7; 7.8.11 - First-Aid Kit, Precaution Kit and Emergency Medical Kit
• MC 15-19 Amendment to Philippines Civil Aviation Regulation - Air Navigation Services (CAR-ANS) Part 11 Incorporating Amendment 51 to ICAO Annex 11 - Air Traffic Services
• MC 18-19 Amendment to Philippine Civil Aviation Regulations - Air Navigation Services (CAR-ANS) Part 15 Incorporating Amendment 40 to ICAO Annex 15
• MC 19-19 Amendment to Philippine Civil Aviation Regulations - Air Navigation Services (CAR-ANS) Part 2 Incorporating Amendment 91 to ICAO Annex 10 Volume II and Other Supplementary Amendments
• MC 20-19 Amendment to Philippine Manual of Standards for Aerodromes (MOS-Aerodromes) Incorporating Amendment 8 to ICAO Annex 14 Volume II
• MC 22-19 Amendment to Philippine Manual of Standards for Aerodromes (MOS-Aerodromes) Incorporating Amendment 14 to ICAO Annex 14 Volume I
• MC 23-19 Amendment to Philippine Civil Aviation Regulations Safety Management Incorporating Amendment 1 to ICAO Annex 19 and Other Supplementary Amendments
• MC 24-19 Amendment to Philippine Civil Aviation Regulations - Air Navigation Services (CAR-ANS) Part 14 Incorporating Amendment 46 to ICAO Annex 2 "Rules of the Air"