One day; it will all make sense.
Or, at least be something I can understand. Not being the brightest bulb on the Christmas tree don't help with the head scratching- however, I wish I could be shed of this nagging irritation about the Rottenest C 208 water operation event: I really do. The 'answer' is certainly simple enough; but it eludes and puzzles me; although I don't know why it should. However, that said – homework time.
It seems that there have been some 'mods' and 'tweeks' made over time to the 208 Flap operation 'system'. Nothing major – basic system – wise and certainly nothing that could (in normal, routine operations) create any sort of 'problem'. Seems simple enough. Your 'Basic' may be found – HERE – at Section 7:24. One page, self explanatory read. Changes and 'tweeks' may be found – HERE-; albeit not an 'official' guide it serves it's purpose. Non of this explains the curious statement from the ATSB related to the Flap system – Nada, zip, nuttin.
Wreckage examination (from Fig.8) onward. ATSB - Dot point - “The flap selector was in the ‘full’ position and the flap position indicator was showing an intermediate position of about 15°. The wing flaps were in the retracted position.”
Being ignorant of float operations; I assume that 'flap' would be used for take off; makes sense. Fine; would the routine (first 'slot' position) 10° be used; or, would the selector be moved to the intermediate 15° (not slotted) position? No idea if it actually matters or is even relevant. Well not until you read the next line from the ATSB.
ATSB - “The wing flaps were in the retracted position.”
This is direct contrast to – ATSB “The wing flaps were selected etc...” This discovery – after retrieval of the air-frame. It was also noted – ATSB - “ The flap selector was in the ‘full’ position.
This aircraft 'collided, at speed with water. This aircraft was 'probably' (guess) configured with flap @ 10 or even 15° of flap for the take-off. The cockpit indicator reflects that selection; Flap selector on retrieval shows a 'Full' down selection (last 'slotted' position) but the Flaps themselves were found 'retracted'.
Please explain – someone. I cannot deduce any sensible reason from the systems notes which can even begin to explain this curiosity. Nor do I have the operational knowledge to dive any deeper. BUT there is no-way known that this is not a factor in this drama. ATSB seem to have skipped around this data. However; this is an electrical system; what the pointer shows is what you selected. Somewhere between zero flap afterwards and flap 15° (Assumed) set for the take off – how is it that on recovery Flap was 'retracted'?
P2: "This prelim was actually 21 days overdue according to the ICAO Annex 13 requirement for a prelim report to be published within 30 days of the accident occurring."
Aye; it beats me – perhaps this is why ATSB dragged their collective 'Learning's (Grrr) out for 50 odd days; do they not know why either? T'is no matter; as stated – not within my area of expertise; but it surely does fall square into the 'curiosity' area – big time. - Handing over::-::
Toot – toot.
Or, at least be something I can understand. Not being the brightest bulb on the Christmas tree don't help with the head scratching- however, I wish I could be shed of this nagging irritation about the Rottenest C 208 water operation event: I really do. The 'answer' is certainly simple enough; but it eludes and puzzles me; although I don't know why it should. However, that said – homework time.
It seems that there have been some 'mods' and 'tweeks' made over time to the 208 Flap operation 'system'. Nothing major – basic system – wise and certainly nothing that could (in normal, routine operations) create any sort of 'problem'. Seems simple enough. Your 'Basic' may be found – HERE – at Section 7:24. One page, self explanatory read. Changes and 'tweeks' may be found – HERE-; albeit not an 'official' guide it serves it's purpose. Non of this explains the curious statement from the ATSB related to the Flap system – Nada, zip, nuttin.
Wreckage examination (from Fig.8) onward. ATSB - Dot point - “The flap selector was in the ‘full’ position and the flap position indicator was showing an intermediate position of about 15°. The wing flaps were in the retracted position.”
Being ignorant of float operations; I assume that 'flap' would be used for take off; makes sense. Fine; would the routine (first 'slot' position) 10° be used; or, would the selector be moved to the intermediate 15° (not slotted) position? No idea if it actually matters or is even relevant. Well not until you read the next line from the ATSB.
ATSB - “The wing flaps were in the retracted position.”
This is direct contrast to – ATSB “The wing flaps were selected etc...” This discovery – after retrieval of the air-frame. It was also noted – ATSB - “ The flap selector was in the ‘full’ position.
This aircraft 'collided, at speed with water. This aircraft was 'probably' (guess) configured with flap @ 10 or even 15° of flap for the take-off. The cockpit indicator reflects that selection; Flap selector on retrieval shows a 'Full' down selection (last 'slotted' position) but the Flaps themselves were found 'retracted'.
Please explain – someone. I cannot deduce any sensible reason from the systems notes which can even begin to explain this curiosity. Nor do I have the operational knowledge to dive any deeper. BUT there is no-way known that this is not a factor in this drama. ATSB seem to have skipped around this data. However; this is an electrical system; what the pointer shows is what you selected. Somewhere between zero flap afterwards and flap 15° (Assumed) set for the take off – how is it that on recovery Flap was 'retracted'?
P2: "This prelim was actually 21 days overdue according to the ICAO Annex 13 requirement for a prelim report to be published within 30 days of the accident occurring."
Aye; it beats me – perhaps this is why ATSB dragged their collective 'Learning's (Grrr) out for 50 odd days; do they not know why either? T'is no matter; as stated – not within my area of expertise; but it surely does fall square into the 'curiosity' area – big time. - Handing over::-::
Toot – toot.