Is AD 71-20-02 a recurring Airworthiness Directive?

No — AD 71-20-02 is a one-time directive. Verify it was complied with in the aircraft's records.

Which aircraft does AD 71-20-02 apply to?

AD 71-20-02 applies to De Havilland — models D.H. 114 Heron. Serial/part conditions may narrow it to specific aircraft.

Airworthiness Directive 71-20-02

one-time

AD 71-20-02 · 1971-01-01 · airframe

Airworthiness Directives; that the emergency escape hatches (P/N's 14 FS.2991A, 4 FS.835A/1, or 4 FS.835A/2) can be opened from outside the airplane accompl

Which aircraft AD 71-20-02 applies to

MakesDe Havilland

ModelsD.H. 114 Heron

Part-conditional — 14 FS.2991A, 4 FS.835A/1, 4 FS.835A/2.

Emergency escape hatch operability check per de Havilland Heron (114) Technical News Sheet Series No. F.16 (applicability read from the AD teaser — confirm exact model/serial from the records.)

Whether AD 71-20-02 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 71-20-02 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.