13) Periodical Rising And Dropping Of Boost Pressure And Engine Speed (Surging Of The Tcu) - Rotax 914 F Maintenance Manual

12.4.13) Periodical rising and dropping of boost pressure and engine speed
(surging of the TCU)
Inspect engine and especially turbo charger and air intake system.
check wiring. See chapter 12.3.16)
If no physical damage can be detected, check the TCU. Consult chapter
13.6).
ATTENTION: If the limits of operation are exceeded or fall short of conduct
the relevant checks additionally.
WARNING: Do not start engine before trouble is found and rectified.
Modification no. Reference Main Date Page
- 0 - 914 F 1997 02 01 119