AD 98-09-14
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Diamond Aircraft Industries GmbH | HK 36 TTC | Airworthiness Directives; Diamond Aircraft Industries Models HK 36 TTS and HK 36 TTC Sailplanes |
| aircraft | Diamond Aircraft Industries GmbH | HK 36 TTC-ECO | Airworthiness Directives; Diamond Aircraft Industries Models HK 36 TTS and HK 36 TTC Sailplanes |
| aircraft | Diamond Aircraft Industries GmbH | HK 36 TTC-ECO (Restricted Category) | Airworthiness Directives; Diamond Aircraft Industries Models HK 36 TTS and HK 36 TTC Sailplanes |
| aircraft | Diamond Aircraft Industries GmbH | HK 36 TTS | Airworthiness Directives; Diamond Aircraft Industries Models HK 36 TTS and HK 36 TTC Sailplanes |
Unsafe Condition
The incorrect banjo bolt without a valve seat, having a built-in orifice, could cause possible loss of engine power, leading to possible loss of control of the sailplane.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Inspect the turbocharger oil-pressure line for a banjo bolt with part number 941 782 (or FAA-approved equivalent) and a valve seat. If an incorrect bolt is found, replace it with the correct part and repair or replace the turbocharger as per Bombardier ROTAX Technical Bulletin No. 914-04.
AI-generated summary from the source AD text. Verify against the official source before acting.
Compliance Time
within the next 10 hours time-in-service (TIS) after the effective date of this AD, unless already accomplished
AI-generated summary from the source AD text. Verify against the official source before acting.
Affected Aircraft
Diamond Aircraft Industries Models HK 36 TTS and HK 36 TTC sailplanes, all serial numbers, equipped with Bombardier ROTAX 914 F series engines, serial numbers 4,420.011 through 4,420.058.
AI-generated summary from the source AD text. Verify against the official source before acting.
Source: Official FAA Source ↗
Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
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