OM-A definitions, responsiblities & crew composition Flashcards
(44 cards)
Alert Height (def)
Specified radio height based on the characteristics of the aircraft and its fail-operational landing system. If a failure occurs above in one of the required redundant systems: G/A or revert to higher minima. If a failure in one of the required redundant systems below the AH: continue.
Altitude (def)
The vertical distance of a level, a point or an object considered as a point measured from the mean sea level
Cloud base (def)
The height of the base of the lowest observed or forecast cloud element in the vicinity of an aerodrome, normally measured above aerodrome (reported as FEW or SCT)
Cold aircraft (def)
An aircraft that has been left unattended, either overnight or temporarily
Contaminated runway (def)
A runway is contaminated when a significant portion of its surface is covered with a layer of fluid contaminant not considered as thin or a hard contaminant. Significant portion; 25 percent of one third of the runway surface area within the required length and width being used
Converted meteorological Visibility (CMV) (def)
A value equivalent to RVR which is derived from the reported meteorological visibility
Critical phases of flight (def)
Take off run, take off flight path, final approach, missed approach, landing, landing roll and any other phases of flight as determined by commander/PIC
Damp runway (def)
A runway is damp when the surface is not dry but when the moisture does not give it a shiny appearance. For ops purposes, a damp runway is considered wet
DA/DH (def)
Specified altitude or height in a 3D instrument approach at which a missed approach must be initiated if the required visual reference has not been established. DA refers to MSL and DH is referenced to runway threshold. For operating to DA the aircraft altimeters are set to QNH. DH = RA based.
Fail operational flight control system (def)
In the event of a failure below alert height, the approach, flare and landing can be completed automatically. In the event of a failure, the automatic landing system, will operate as a fail-passive system.
Fail Passive flight control system (def)
In the event of a failure, there is no significant out of trim condition or deviation of flight path or attitude but the landing is not automatically completed. The pilot assumes control of the plane after a failure
Final reserve fuel (def)
An amount of fuel calculated to fly 30 mins at holding speed at 1500ft above aerodrome elevation in standard conditions, calculated with estimated weight on arrival at alternate or at the destination when no alternate is required.
Low visibility operations (def)
Approach or take off operations on a runway with an rvr less than 550m or with a DH less than 200ft
Low visibility procedures (def)
Procedures applied by an aerodrome for the purpose of ensuring safety during LVOs
Net flight path (def)
Path determined for engine(s) failure case. It’ll represent the actual climb performance diminished by a gradient of climb of:
- take off n-1 0.8% for two-engine aircraft
- enroute n-1 1.1% for two-engine aircraft
Safe landing (def)
A landing at an adequate aerodrome with no less than final reserve fuel remaining and in compliance with the applicable operation procedures and aerodrome operating minima
Seperate runways (def)
Runways at the same aerodrome that are seperate landing surfaces. These runways may overlay or cross in such a way that if one of the runways is blocked, it will not prevent the planned type of operations on the other runway. Each runway shall have a seperate approach procedure based on a seperate navigation aid
Steep approach (def)
Any approach with a glideslope angle of 4.5 degrees or more is considered steep. All approaches exceeding 4.5 degrees descent angle require a specific operator approval for each type.
Type A instrument approach operation (def)
An instrument approach operation with an MDH or DH at or above 250ft
Type B instrument approach operation (def)
An operation with DH below 250ft. Categorised as:
- Cat I: DH >=200ft and vis =>800m or RVR=>550m
- Cat II: DH<=200ft but =>100ft and RVR=>300m
- Cat III: DH=<100ft or No DH and RVR =<300m
Wet runway (def)
A runway is wet when its surface is covered by any visible dampness or water up to and including 3mm deep within the area of inteded to be used
Regulatory Authority
The operator shall take all reasonable measures to ensure that all persons carried in the aircraft obey all lawful commands given by the commander for the purpose of securing the safety of the aircraft and of persons/property carried therein.
Regulatory Responsibilities
The commander is responsable for safety of crew, pax and cargo from the moment the plane is ready to move for purpose of taxiing prior to takeoff until the engines are shut down. Take any actions needed to securing the safety of the aircraft, can disembark any person, can refuse pax/inadmisssables if safety related. All checklists, procedures, searches should be complied with. Accept he aircraft i.a.w. MEL, pre-flight is done, emergency equipment is ok. Shall take action immediate if required in an emergency situation, file an ACAS report if RA is generated and inform ATS when bird strikes/hazards are present.
Company Responsabilities
Flight deck door is closed after engine start, pax are properly secured when taxiing/takeoff/ldg and whenever advisable, no loose articles in flightdeck, add safety margins if needed, continuous listening watch on right frequencies, post de-brief if needed, pilot uniform standard is maintained and all relevant info relating the flight is transmitted by ACARS.
