14 CFR Part 121

What type of operations are governed by Part 121?

(14 CFR 121.1) Part 121 prescribes rules governing domestic, flag, and supplemental operations of each person who holds or is required to hold an air carrier certificate or operating certificate under 14 CFR Part 119.

Which manual would a Part 121 pilot or dispatcher reference to find instructions and information concerning continuance of flight after equipment required for the particular type of operation becomes inoperative or unserviceable enroute?

(14 CFR 121.133, 121.135) The FOM

Which manuals are required to be carried onboard a Part 121 air carrier aircraft?

(14 CFR 121.133, 121.137, 121.141) 1. An airplane flight manual (AFM) or company flight manual (CFM) (121.141) 2. A flight operations manual (FOM) (121.133) FOM must be accessible to the flight crew (121.137)

What effective runway length is required for a turbojet powered airplane at the destination airport if the runways are forecast to be wet or slippery at ETA?

(14 CFR 121.195) 115% of the runway length required for a dry runway.

What portable electronic devices may be operated during flight?

(14 CFR 121.306) 1. Portable voice recorders 2. Hearing aids 3. Heart pacemakers 4. Electric shavers 5. Portable oxygen concentrators 6. Any other portable device that the 119 certificate holder has determined will not cause interference with navigation or communication.

When must the emergency lights on a passenger-carrying airplane be armed or turned on?

(14 CFR 121.310) The emergency lights must be armed or turned on during taxiing, takeoff, and landing.

A crewmember interphone system is required on which airplane?

(14 CFR 121.319) No person may operate an airplane with a seating capacity of more than 19 passengers unless the airplane is equipped with a crewmember interphone system.

What is the passenger oxygen supply requirement for a flight, in a turbine-powered aircraft, with a cabin pressure altitude in excess of 15,000'?

(14 CFR 121.329) There must be enough oxygen available for each passenger carried during the entire flights at those altitudes.

What are the pilot supplemental oxygen requirements for emergency descent of turbine-powered airplanes with pressurized cabins?

(14 CFR 121.333) At flight altitudes above 10,000': A minimum of a 2-hour supply of oxygen must be provided for each flight crewmember on flight deck duty. At altitudes above FL250: if it becomes necessary for one pilot to leave his/her duty station, the remaining pilot shall put on and use an oxygen mask until the other pilot has returned to the duty station. Exception: One pilot need not wear and use an oxygen mask if each flight crewmember on flight deck duty has a quick-donning type of oxygen mask. A flight crewmember must be able to put on and start using a quick-donning oxygen mask within 5 seconds.

For the purposes of testing a flight recorder system, how much data may be erased?

(14 CFR 121.343) A total of 1 hour of the oldest recorded data may be erased for the purpose of testing the flight recorder or the flight recorder system.

In which airplanes are class A Terrain Awareness Warning Systems (TAWS) required?

(14 CFR 121.354) No person may operate a turbine-powered airplane unless that airplane is equipped with an approved terrain awareness and warning system that meets the requirements for Class A equipment in TSO-C151. The airplane must also include an approved terrain situational awareness display.

What are the airborne weather radar equipment requirements for air carriers?

(14 CFR 121.357) No person may dispatch an airplane (or begin the flight of an airplane in the case of a certificate holder that does not use a dispatch system) under IFR or night VFR conditions when current weather reports indicate that thunderstorms, or other potentially hazardous weather conditions that can be detected with airborne weather radar, may reasonably be expected along the route to be flown, unless the airborne weather radar equipment is in satisfactory operating condition. If the airborne weather radar becomes inoperative en route, the airplane must be operated in accordance with the approved instructions and procedures specified in the operations manual for such an event.

Who must the crew of a domestic or flag air carrier airplane be able to communicate with, under normal conditions, along the entire route of flight?

(14 CFR 121.99) A two-way radio communication system or other approved means of communication is available over the entire route between each airplane and the appropriate dispatch office, and between each airplane and the appropriate ATC unit.

What is a CFM?

(14 CFR Part 121.141) A CFM is an approved AFM that is developed by, or for, a specific operator for a specific aircraft type and that is approved by the Principle Operations Inspector in accordance with the provisions of 121.141. If an operator carries a CFM aboard the aircraft, that operator is not required to carry an AFM in addition to the CFM.

What is the name of the manual that provides direction and guidance to ground crews for the safe and efficient performance of their duties?

The general operations manual (GOM).