Bob Tait Aviation Theory Forum - Recent Topics

about to do Human Factors

Ravi — Sun, 24 May 2026 14:58:36 +0000

Greetings all

Just wanted to know about the Human Factors exam preparation. Im planning on sitting in a few months.

I have the Bob Tait Text but

1 Is there any other material that is required, like the material from CASA on Human Factors

2. There were apparently questions asked about flight duties and hours, which are ATPL subjects, where do I get this information from?

Kind regards

Ravi

Revision Test 5…Question 21

Paul — Sat, 16 May 2026 00:11:09 +0000

With regard to the question, my answer was C but text has A as the answer. My thoughts were the brighter the night the closer they look and dark nights further away ? Probably be answered with my previous question on the Errata.

IMG_0343.jpeg

Errata Page 46&47

Paul — Fri, 15 May 2026 23:31:07 +0000

Hello,

I am going through the text book (bought this year) and printed the errata but it appears contradictory or an error…i have highlighted the errata that is causing confusion from the text.

Can someone clarify what is correct please….ie. What summary is correct with regard to air and runway lights ?

Thanks,

Paul

sorry for your loss with Bob too….a genuine Legend.

CHUF-Erata.pdf

ECHO

Claudio — Mon, 11 May 2026 09:47:01 +0000

Are the CASA CPL CFPA exam questions all based on the same ECHO aircraft supplement used in the Bob Tait textbook?
I’m now very familiar with the ECHO parameters. 😀

PNR question

Lenny — Mon, 11 May 2026 04:39:17 +0000

Good Afternoon,

I need help with a PNR question I was asked in my CFPA exam. A similar question has already been asked in this forum but I can’t find any answers on it. If anyone could help as I’m retaking the exam on the 16th that would be greatly appreciated.

You are an air transport flight flying from A to C total distance 507nm. You are currently at B which is 203nm from C

current fuel 330kg Fuel flow 130kg/hr

TAS 240kt

wind from B to C -40kts

PNR to B +40kts

B to A +25kts

What is the distance and time from B to the PNR back to A

TAF3 query

Ravi — Sun, 10 May 2026 00:21:30 +0000

Supposing you have a TAF3, arriving in Sydney. The TAF3 is from 220730Z and the conditions are fine to land ( no alt or holding required )

Then FM220900 the conditions change to 26006KT 9999 thunderstorms FEW015 BKN018CB

Your ETA is 0850Z

The question asked how much holding/alternate requirements are needed if the following is forecast at Sydney.

My thoughts that as long as you arrive before the FM, then no alternate or holding is required? Is this correct?

Assuming that if you were to land at 0900, then the conditions require that an alternate is required is that correct?

I understand that in the first 3 hours of TAF3, the time buffers do not apply, but will apply 30 minutes before and after if it is after the first 3 hours

I also understand, that in a TAF3, from ENR1.1 10.7.2.9 that only any reduction in visibility or if there was a PROB30 or PROB40 for TS or associated severe turbulence, then you can ignore this? But if there were other deteriorations ie. if the CLOUD was > SCT below 1500 at ETA, or if the wind was > aircraft could handle? or if there was a definate TS at arrival, then holding fuel would be required? Is this correct?

Is there any reason why CASA has included only 2 parameters to ignore and not the others

Kind regards

Ravi

Some posts are unavailable

Ravi — Sat, 09 May 2026 06:13:02 +0000

There are some posts that come up as 404 and I think they re related to exams

I am about to sit the CPL Met and wanted some generic guidance. Can someone assist.

Id like to know without specifics what types of questions?

The Sydney WAC and PCA are required material but were they of use

How close are the Bob Tait practice tests similiar to the real?

Ive also read the BOM aviation knowledge center and wondered how close or accurate that is?

Any guidance will help

Kind regards

Ravi

CASA EXAM Change to exam permitted materials

Bob Taits admin — Thu, 07 May 2026 01:23:37 +0000

Student Notice – CASA Plain English Guides

CASA has announced that the Plain English Guides may now be used in examinations where the corresponding current legislation is listed as permitted material.

For example, if an exam permits access to Part 61, then the Part 61 Plain English Guide may also be taken into that exam. The same principle applies to other Plain English Guides where the relevant legislation is permitted.

Students must remember that the current legislation remains the primary and correct source. The Plain English Guide is only a supporting document. If there is any difference between the legislation and the guide, the legislation overrides the guide.

At this stage, CASA has not produced Plain English Guides for Part 121 or Part 135. Therefore, there are currently no Plain English Guides available for those Parts.

Please make sure your exam materials are current, permitted for the exam you are sitting, and used correctly.

PNR - Contingency Fuel

expat87 — Mon, 27 Apr 2026 02:49:32 +0000

When calculating a PNR for a Part 135 flight with a 10% contingency requirement, I would like to confirm the correct interpretation of safe endurance.

My understanding is that the trip fuel for the original A to B sector is not used in the PNR calculation, because once the PNR is being determined the relevant flight becomes:
Departure -> PNR -> Departure

Therefore the safe endurance should be:

PNR trip fuel = (Fuel at take-off − final reserve fuel − holding fuel) ÷ 1.1
with the PNR trip fuel then converted to time at the applicable cruise fuel flow.

The reason I am asking is that the original A to B flight may contain margin fuel, and I want to confirm that the 10% contingency is applied only to the fuel required for the PNR return calculation, rather than being based on the originally planned A to B trip fuel to destination.

Can someone confirm whether this is the correct interpretation?

CPL CNAV exam apparent GPWT/GAF questions

James_Fatchen — Mon, 27 Apr 2026 00:49:12 +0000

Hi all,

according to my practise exam provider there is a possibility of GAF and GPWT questions in the CNAV exam! However there is nothing I can see in Bobs CNAV book that references GAF/GPWT, is this something I need to consider before sitting the exam?

thank you