2015

Afgreiðsla

The FAA has issued Safety Recommendation 15.116, gathering and reviewing compliance data, including hazard assessments, for each type of Title 14, Code of Federal Regulations (14 CFR) Part 25 airplane operating under part 121. The FAA will be addressing Safety Recommendation 15.116 for U.S.-manufactured aircraft. Furthermore, the FAA recommended to the ITSB to provide a similar recommendation to foreign aviation authorities for each State of design. The board of ITSB approved on a board meeting held on January 15th, 2016, to contact other states of designs of aircraft of similar spoiler design and extend the recommendation as needed.

Update: 31.01.2017:

The FAA has reviewed the design, manufacturing, and service information and determined the Boeing Model 757 failed BTRV housing was under-designed in that it had insufficient fatigue life. The reason for this was found to be a design error that led to a premature failure. The valve itself was designed by a third party, Moog, which reported that the valve is used only on the Boeing Model 757 series airplanes. Therefore this under-designed part is not on any other transport airplanes. Additionally, a quary of the FAA Service Difficulty Report (SDR) database did not reveal any other spoiler issue associated with the blocking/thermal relief valves in the past fifteen years on any transport airplanes. The FAA considers its action to Safety Recommendation 15.116 completed.

Afgreiðsla

The FAA has issued Safety Recommendation 15.115, a Boeing 757 airplane level safety issue, mandating evaluation of the spoiler actuator's blocking and thermal relief valve housing failure to determine appropriate corrective action.

Update 31.01.2017:

The FAA has reviewed and determined that the latent failure of the spoiler power control unit Blocking and Thermal Relief Valve (BTRV) housing does manifest itself when the hydraulic system it is attached to fails. The failure causes an uncommanded extension of the spoiler panel, known as spoiler panel float. The result of multiple spoiler panel floating can lead to the loss of the airplane. The FAA's Aircraft Certification Service has determined this is a safety issue and the FAA is in the process of publishing an airworthiness directive to address it.

Updated 6.10.2017:

The FAA has issued Airworthiness Directive 2017-04-07, mandating that within 51 months after January 23 2017, for all Boeing 757-200, -200PF, -200CB, and -300 series airplanes, certificated in any category, each spoiler power control unit (PCU) must be replaced with a new or changed PCU at spoiler positions 2, 3, and 4 on the left wing, and spoiler positions 9, 10, and 11 on the right wing, in accordance with the Accomplishment Instructions of Boeing Alert Service Bulletin 757-27A0154, dated July 22, 2016. This concludes the above safety recommendation issued by the Icelandic Transportation Safety Board on August 13th, 2015.

Afgreiðsla

The FAA has issued Safety Recommendation 15.116, gathering and reviewing compliance data, including hazard assessments, for each type of Title 14, Code of Federal Regulations (14 CFR) Part 25 airplane operating under part 121. The FAA will be addressing Safety Recommendation 15.116 for U.S.-manufactured aircraft.

Afgreiðsla

Boeing plans to release Boeing Alert Service Bulletin 757-SB-27A0154 on June 25 2016. In addition the FAA has issued Safety Recommendation 15.115, a Boeing 757 airplane level safety issue, mandating evaluation of the spoiler actuator's blocking and thermal relief valve housing failure to determine appropriate corrective action.

Afgreiðsla

Moog has redesigned the Blocking and Thermal Relief Valve Housing with thicker material section and more radius in the area of the fracture surface. The redesigned Blocking and Thermal Relief Valve Housing is made from stainless steel instead of aluminum. This results in better fatigue performance of the Blocking and Thermal Relief Valve Housing. In addition the FAA has issued Safety Recommendation 15.115, a Boeing 757 airplane level safety issue, mandating evaluation of the spoiler actuator's blocking and thermal relief valve housing failure to determine appropriate corrective action.

Afgreiðsla

Technify Motors reconsidered the design of the crankshaft belt pulley fastener P/N 05- 7223-K000501 in order to prevent loosening of the fastener and provided a report to EASA. In the report different options of locking mechanism were considered. The preferred solution was to mark the bolt with torque seal and decided to implement it. This way, the security of the correct sit of the crankshaft main bolt could be checked during inspections, to see if it was loosening over time.

Afgreiðsla

Technify Motors added several notes to repair procedures (RM-02-02) during which the mechanic might have the idea to demount the pulley and informed all registered users regarding the new versions.

Afgreiðsla

Þessari tillögu er beint til flugmanna almennt og því er henni lokið með útgáfu hennar. Að auki mun RNSA ræða þessa tillögu á næstu flugöryggisfundum.

Afgreiðsla

Samgöngustofa vinnur að mati á því hvort líkur séu á að flugöryggi yrði bætt með því að gera kröfur um fjarskiptabúnað í svæðunum sem og upptökubúnað og þá með tilliti til þeirra breytinga sem verið er að vinna að á Austursvæði og svæðinu í kringum Sandskeið.

Niðurstaða matsins:

Fyrr á þessu ári (2017) rýndi SGS þau flugatvik sem tilkynnt voru árið 2016 og tengdust starfrækslu innan þeirra svæða sem skilgreind hafa verið og eru talin upp hér að neðan. Ekkert atvik hafði verið tilkynnt til SGS sem var þess eðlis að upptökur fjarskipta í umræddum svæðum hefðu skipt máli fyrir rannsókn atviksins. SGS taldi rétt að safna frekari gögnum og ákvað því að hafa málið opið lengur og endurmeta stöðuna síðar á þessu ári.

Nú hefur sú skoðun farið fram, rýnd voru þau atvik sem tilkynnt hafa verið og tengjast starfrækslu í Austursvæði og á Sandskeiði, engin atvik voru tilkynnt vegna starfrækslu í öðrum þeim svæðum sem upp eru talin hér að neðan. Það er mat SGS að upptökur fjarskipta innan umræddra svæða hefðu gert neitt til viðbótar við þær upptökur sem þegar eru gerðar á fjarskiptum í flug.

Samgöngustofa mun því að svo stöddu ekki gera þá kröfu að afrit af fjarskiptum á skilgreindum svifflugs- og æfingasvæðum á Íslandi verði gerð tiltæk eins og lagt var til af Rannsóknarnefnd samgönguslysa. Við óskum eftir því að málinu verði lokað með þeirri afgreiðslu SGS.

Afgreiðsla

Flugrekandinn tók undir tillöguna og vinnur að endurskipulagningu verklags við óstjórnaða flugvelli sem tekur enn betur á yfirflugi og köllum við óstjórnaða velli.