Welcome to the website of AvioConsult
AvioConsult, an independent aircraft expert and consultant,
- Teaching on
Airplane Control after Engine Failure,
because the knowledge of controlling a multi-engine airplane after
engine failure, as taught at Aeronautical Universities and Experimental
Test Pilot Schools, is not passed on anymore to (airline) pilots since
some 40 - 50 years ago, leading to a fatal accident almost every month.
Please check the Recent activities
Downloads page for
papers and the
Accidents page for accident reports.
- Advice and teaching on airplane flying qualities,
performance and (experimental) flight-testing;
- Expertise for accident investigations and is available
as expert witness;
- Aircraft accident investigation report reviews, please
Downloads page and
Accidents page for samples;
- Writing manuals and checklists.
Education and experience are presented below.
Recent activities: the prevention of
airplane accidents after engine failure.
Why do accidents after engine failure or while an engine is inoperative
continue to happen on big and small multi-engine airplanes nearly every
Because flight manuals, student pilot textbooks and training manuals
inappropriately use paragraphs out of Aviation Regulations (Part 23 and
25) that are intended to be used for the design, certification and
flight-test of airplanes but definitely not for their operational use.
inappropriate use of Regulations results in deficient minimum
control speed definitions and engine emergency procedures for pilots and
hence, in inappropriate crew response to propulsion system malfunctions.
Want to read more about this? Please proceed to the
Downloads page and/ or
the Accidents page. Or play this
amateur video, but with highest level professional content, from YouTube:
A 42 min. video
lecture, in which the real value of the minimum
control speed airborne (VMCA) is explained as taught at
all formal Test Pilot Schools and by most aeronautical universities.
The included video clips of two fatal accidents were originally
published by the NTSB and ATSB (EMB-120ER).
Discussed are VMCA and the flight-constraints that come
with it, but that are regrettably not published (anymore) in
Airplane Flight Manuals and pilot course books during the past 45
years. The real cause of the two accidents is explained. The
deficient definitions of VMC(A) in most Airplane Flight
Manuals are also reviewed.
to start the video.
A pdf file with slides and script used in this video can be
Please check the News page for recent additions
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- Graduated as Flight Test Engineer
at the USAF Test Pilot School, Edwards Air Force Base, CA (class
1985A). Refer to the
- Five years experience as Chief Experimental Flight Test
of the Royal Netherlands Air Force (LtCol ret'd), responsible for
experimental flight testing of all Air Force fixed wing and helicopter
types, evaluation of new aircraft and aircraft systems and all
operational aircraft manuals.
- Over 15 years of experience in performing and reporting
on experimental flight tests with, and qualitative evaluations of,
aircraft on subjects: performance, flying qualities, airborne systems,
ergonomics of crew stations, airborne system software, etc.
- Contributed to design meetings and reviews for
procurement, modification and certification, and to (experimental)
flight testing of:
- Fixed wing aircraft: KDC-10, C-130, F27, F50,
F60, PC-7, Gulfstream IV, A330, NF-5 and F-16;
- Helicopters: BO-105, AB-412, AS-532 Cougar, CH-47
Chinook, AH-64A Apache and Alouette III;
- Unmanned Aerial Vehicle: Sperwer.
- Participated in start-up of EADS-CASA A330 tanker
- Also experienced with light, very light and ultra light
airplanes and gliders.
- Developed aircrew checklists and other flight
operations related documentation.
- Evaluated flight operations support software.
- Participated in NATO Avionics and Navigation Systems
- Performed Quality Management System auditing (ISO
9001:2000) as both auditor and lead auditor (qualified by DNV).
- Reviewed aircraft accident investigation reports of
accidents with C-130 Hercules, Saab SF-340, Nomad, Boeing 737 and
747, Piper PA 44-180, Beech C90, BN-2, Cessna 404, MU-2B, DC-10,
EMB-120, etc., and wrote (supplemental) reports (please refer to the
- Provided aircraft expertise as expert witness in
law suits in USA and NL.
- Received flight test training and flight test
experience during the USAF TPS course (1985) in: T-38A, C-130H, F-5F,
RF-4C, YF-4E, NC-131H, UH-1H, CH-136A, KC-135, Learjet, A-37B, P-3C,
NC-141A, T-34C, DHC-2, DHC-6, Boeing 707, Boeing 737, KC-10A, T-39,
T-43, S-3 and in simulators B-747, B-767, B-727, A-10.
Private flying experience:
- Private Pilot License (EU and US) and flying experience
in: C-150, C-172, PA-18-135, T-67M, DV20, P92, Rallye 150T, SF28.
- Glider and Powered Glider Pilot, instructor and
examiner in many different types.
Would you like to learn more about Test Pilot
Schools? Please check the
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Chamber of Commerce, The Netherlands.
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A copy will be sent upon request.
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