Air Operations: AOC, Operating Procedures and Flight Duty Time Limitations
This domain tests Annex 6 Part I and the Indian air transport requirements in CAR Section 3 (Air Transport) and CAR Section 7 Series F Part II (FDTL). Examiners look for whether you understand the operator's system obligations and the crew's hour limits as legal limits, not rostering suggestions.
The AOC
An Air Transport Operator's Certificate is granted by DGCA under the Aircraft Rules and the air transport CARs, specifying the types, areas of operation and special approvals authorised. The holder must maintain an Operations Manual, an approved training and checking programme, a MEL, a fuel policy with reserves, dangerous goods procedures, an emergency response plan, and a safety management system. Operations outside the AOC specification are unauthorised, however safe they may look.
Operating procedures
Standard operating procedures are the operator's means of compliance; the commander retains final authority for the flight. Fuel planning must cover taxi, trip, contingency, alternate and final reserve. Crew complement, ETOPS and low-visibility approvals are all specific authorisations, not general privileges.
FDTL
Flight duty period is the total time from reporting to the end of duty, including positioning and ground duties. The CAR sets maximum FDP by report time and crew complement, shortening as duty starts earlier and lengthening with augmentation. Cumulative limits apply across 7, 14, 28 and 365 days; minimum rest, weekly rest, standby treatment and time-zone acclimatisation all constrain the roster. The commander may extend FDP only in the circumstances the CAR allows, with a written report.
Worked example
A crew reports at 04:20 for five sectors. The scheduler must apply the early-report column of the FDP table, add each sector's ground time, and then check cumulative flight time and rest for the preceding 7 and 28 days. A valid single-day FDP does not make the roster lawful if a cumulative limit is already exceeded.
Traps
Treating the MEL or SOP as guidance. Believing commander's discretion is unlimited. Ignoring positioning time. Assuming rest at a layover equals rest at home base for acclimatisation purposes.