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Message: <blockquote data-quote="rochel1977" data-source="post: 4099685" data-attributes="member: 371">Dutch Safety Safety Board: Safety Alert to Boeing: Recommend to review Fligth Manual B737: if radio altimeters are inop, autothrottles and autopilot must not be engaged;<img src="http://cdn-www.airliners.net/aviation-photos/photos/6/0/6/1489606.jpg" alt="" class="fr-fic fr-dii fr-draggable " style="" />* 9 casualties;* 80 wounded, 28 still in hospital;* TK 1951 ETA 10.40* No problems until last moment;* 3 qualified pilots in cockpit;* 1st officer flying the aircraft;* TK1951 received landing clearance, no delay in approach, direct approach;* Autopliot engaged during approach;* DFDR and CVR in good condition;* at 1950 ft, LH radio altimeter step change read out from 1950 ft to -8ft;* this faulty altitude was also reported to autothrottle;* CVR: crew saw altimeter discrepancy;* Crew did not see this discrepancy as problem, and lowered gear as gear warning was activated due to -8 ft radio alt;* As a result, autothrottle went into retard mode at 1950 ft rather than 50 ft due to faulty radio altimeter read out;* Aircraft slowed to stall speed;* Aircraft flight controls [autothrottles] thought airplane was above runway and went into "flare mode";* At 450 ft stall warning /stick shaher activated;* power was increased immediately [!] [TOGA?], but power increase was too late to continue flight;* identical problem with LH radio altimeter happened twice before on this airplane in last eight flights;* that data was still on DFDR, as it had 25 hrs upto crach of recorded information;* Landing gear and engines broke off at impact as designed;* due to high power setting engines flew forward by 250m at impact separation;* investigation will now focus on radio altimeter, and relation/logic with autothrottle system;* runway was not [very well] visable to crew;* Dutch Safety Board will lead investigation;* Several other parties will support investigation [NTSB, Boeing, CFM internaional, Turkish authorities, ;* Good words for justice department, especially in isolating area around airplane;* Safety Board and Jutice Department back on same frequency;* Main objective of investigation is fact finding and improve safety;* Justice department will limited access to data, to protect "whistleblowers";* radio altimeter fault is only technical fault found so far;* No indications of ATC faults;* No indications of [wake-]turbulence;* Too early to tell if crew made mistakes;* All members of invetsigation team are on same line of thinking* Not yet known where the 2 previous occurances of LH radio Alt happened* LH radio Alt not considered flight critical component, as function can be taken over manually by crew;* No conclusions on TK maintenance activities and procedures;* Aircraft will be recovered this week;<img src="/styles/default/xenforo/smilies/default/dull.gif"  class="smilie" loading="lazy" alt=":dull:" title="Dull    :dull:" data-shortname=":dull:" /> <img src="/styles/default/xenforo/smilies/default/dull.gif"  class="smilie" loading="lazy" alt=":dull:" title="Dull    :dull:" data-shortname=":dull:" /> <img src="/styles/default/xenforo/smilies/default/dull.gif"  class="smilie" loading="lazy" alt=":dull:" title="Dull    :dull:" data-shortname=":dull:" /></blockquote>

Verification: Hathara warak wissa keeyada? (Hathara wadi karanna 20)

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