Airworthiness Directive · Amendment 39-16801 · Austro Engine GmbH Model E4 Diesel Piston Engines
Austro Engine GmbH Model E4 Diesel Piston Engines
This AD applies to Austro Engine GmbH model E4 diesel piston engines, with high-pressure (HP) fuel pump, part number (P/N) E4A-30-100-000, installed.
We are superseding an existing airworthiness directive (AD) for the products listed above. That AD currently requires frequent inspections of the fuel pressure supply for excessive oscillations to determine if high-pressure (HP) fuel pumps have been exposed to damaging pressure oscillations. Pumps that have been exposed require replacement before further flight. This new AD requires the initial and repetitive inspections of AD 2010-23-09, but also requires installing HP fuel pump part number (P/N) E4A-30-200-000, as mandatory terminating action to the repetitive inspections. We are issuing this AD to prevent engine power loss or in-flight shutdown, which could result in loss of control of the airplane.
Comply with this AD within the compliance times specified, unless already done.
(1) Inspect the fuel pressure supply for excessive oscillations using the inspection schedule in Table 1 of this AD.
| Accumulated Time-Since-New (TSN) or Time Since Last Inspection (TSLI): | Compliance time: |
|---|---|
| 45 flight hours or more | Within 10 flight hours after the effective date of this AD. |
| Fewer than 45 flight hours | Before 55 flight hours TSN or TSLI. |
| Repetitive inspections | Before 55 flight hours TSLI. |
(2) Use Austro Engine GmbH Work Instruction No. WI-MSB-E4-009, dated October 7, 2010, to do the inspections.
(3) Replace the HP fuel pump before further flight with a new HP fuel pump, P/N E4A-30-200-000, if the oscillations exceed 300mV (750hPa).
(4) As mandatory terminating action to the repetitive inspections, within 120 flight hours after the effective date of this AD, replace the HP fuel pump, P/N E4A-30-100-000, with a HP fuel pump, P/N E4A-30-200-000. Austro Engine GmbH Mandatory Service Bulletin (MSB) No. MSB-E4-009/2 contains guidance on replacing the HP fuel pump.
After the effective date of this AD, do not install any HP fuel pump P/N E4A-30-100-000, onto any engine.
(g) After the effective date of this AD, do not install any engine equipped with HP fuel pump P/N E4A-30-100-000, onto any airplane.
The aircraft, engines and makers this AD names, by the model designations in its text. A model listed here may still be outside the AD's serial ranges.
