AD/F27/38 - ADF Sense Antenna - Modification
1AD/F27/38 - ADF Sense Antenna - Modification
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COMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 - 105 CIVIL AVIATION SAFETY AUTHORITY
SCHEDULE OF AIRWORTHINESS DIRECTIVES
Image unavailable in extracted text Fokker F27 Series Aeroplanes
AD/F27/38 ADF Sense Antenna - Modification 12/67
Applicability: All models fitted with Bendix type DFA-70A ADF equipment.
Requirement: Modify the sense antenna to achieve the following minimum performance characteristics:-
(a) Effective Height : Not less than 0.25 metres.
(b) Sensitivity Product Value : Between the limits of 12 and 25 micro-microfarads- meters.
(c) Total capacity of antenna and transmission line presented to receiver input terminals : 270 micro-microfarads + 10%.DE
(d) Tilt Angle : between the limits of -20º and +10º.