Airworthiness Directive 74-17-05
one-timeAD 74-17-05 · 1974-01-01 · other
Airworthiness Directives; hydraulic flow divider P/N 1159 SCH 255-1. (B) Remove AN815-6 union from flow divider. Remove restrictor-filter P/N H962-041 from
Which aircraft AD 74-17-05 applies to
MakesHydraulic Flow Divider P N 1159 Sch 255-1 Remove An815-6 Union From Flow Divider Remove Restrictor-Filter P N H962-041 From Control Valve And Install In Open Port Of Flow Divider Line P N 1159H20014-770 Grsu-6 And Open To Atmosphere Secure Hydraulic Line And Restrictor-Filter Plug Control Valve With P N An814-6D Plug And P N 1159H20011-6 O ) Removehydraulic Line P N 1159H20014-770 Grsu-6 Which Connects Ground Spoiler Control Valve To Hydraulic Flow Divider P N 1159 Sch 255-1 Remove An815-6 Union From Flow Divider Remove
ModelsH962-041
Whether AD 74-17-05 actually applies to your aircraft (by serial and installed parts) and whether it’s already complied with comes from that aircraft’s records.
How AD compliance is recorded
A valid compliance record (14 CFR 43.9) states:
Method of compliance — The specific action taken (inspected, replaced, modified) and to what revision.
Date — When the work was done.
Aircraft time — Total time in service / tach at compliance — how recurring next-due is computed.
Signature & certificate — The A&P/IA who returned it to service, with certificate number.
Is AD 74-17-05 complied with on your aircraft?
Tailplate reads a tail number’s logbooks and matches every applicable AD — including this one — to its compliance evidence, with recurring next-due dates computed.
Look up a tail number →Applicability is derived from the FAA directive corpus and is advisory, not a legal airworthiness determination. Compliance is established only from an aircraft’s actual records.