Det var lidt det her jeg ville ind på.Boeing lär inte sälja många nya 787 innan batteriproblemen är lösta.
Uttalanden från FAA chefen indikerar att det troligen kommer ta lång tid.
Jag tror framförallt Airbus A330 och Boeing 777-300ER kommer fortsätta sälja bra under 2013.
NTSB report on 787 coming Thursday
The NTSB will issue an interim report Thursday on the lithium ion battery fire in January aboard a parked Boeing 787 Dreamliner
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There’s no indication that the interim report will provide an answer, though it may make clearer whether or not a definitive cause is likely to be identified later.
The report is “factual in nature and does not provide any analysis,” the NTSB said in a statement Wednesday.
Boeing’s 787s have been grounded since Jan. 16, when a second battery overheated and smoldered during an All Nippon Airways flight in Japan a week after the incident at Logan.
Boeing has proposed a fix for the battery problem — which, in the absence of a known root cause, attempts to address all possible battery system malfunctions. The company is awaiting approval from the Federal Aviation Authority (FAA) to implement that fix.
The FAA is expected to give its initial response late this week or early next.
All Nippon Airways Co. (9202), the biggest operator of Boeing Co. (BA) 787s, repaired three damaged circuit boards last year on Dreamliners, the aircraft that was grounded worldwide this year after lithium-ion batteries caught fire.
Of three circuit boards that burned, one that was damaged in April had to be replaced, Shozo Tsue, secretary general of the Japan Federation of Aviation Workers’ Unions, told reporters in Tokyo today. ANA fixed three circuit boards last year safely before flights, Megumi Tezuka, an ANA spokeswoman said by telephone.
Tsue said he doesn’t know whether there is a link between circuit-board damage and the battery fires and that he has sent a letter to the nation’s transport minister asking that “issues” uncovered in the 787 be reconsidered. Boeing’s Dreamliners have yet to fly commercially after the January grounding, the first time in 34 years an entire airplane model has been pulled from service.
“The circuit board case on April 7 was serious and caused damage to the surrounding area,” Tsue said.
Investigators have yet to say they’ve found the causes of a lithium-ion battery fire on a Japan Airlines Co.-operated Dreamliner in Boston in January and that for an emergency landing of an ANA 787 later that month.
Raporten på 48 sider kan leses i sin helhet påExternal observations of the battery involved in this incident showed, among other things, that the right side of the battery case appeared to have the most extensive damage of the four battery sides.3 Disassembly of the battery revealed that the cells that were located in the left side of the battery (cells 1 through 4) generally exhibited the least thermal and mechanical damage and that the cells that were located in the right side of the battery (cells 5 through 8) generally exhibited the most thermal and mechanical damage. Thermal damage was the most severe near cell 6. Continuity measurements using a digital volt meter indicated that all of the cells were found to be electrically short circuited except for cell 8.
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Appendix Appendix —Boeing 787 Type Certific Boeing 787 Type Certific Boeing 787 Type Certific Boeing 787 Type Certific Boeing 787 Type CertificBoeing 787 Type Certific Boeing 787 Type Certific ation ation Special Conditions Special Conditions Special Conditions Special Conditions Special Conditions 25 -359 359-SC
The FAA issued the following nine special conditions, in place of the electrical equipment and installation requirements of 14 CFR 25.1353(c)(1) through (c)(4), for the design and installation of lithium-ion batteries as part of the type certification basis for the Boeing 787-8:
(1) Safe cell temperatures and pressures must be maintained during any foreseeable charging or discharging condition and during any failure of the charging or battery monitoring system not shown to be extremely remote. The lithium ion battery installation must preclude explosion in the event of those failures.
(2) Design of the lithium-ion batteries must preclude the occurrence of self-sustaining, uncontrolled increases in temperature or pressure.
(3) No explosive or toxic gases emitted by any lithium-ion battery in normal operation, or as the result of any failure of the battery charging system, monitoring system, or battery installation not shown to be extremely remote, may accumulate in hazardous quantities within the airplane.
(4) Installations of lithium-ion batteries must meet the requirements of 14 CFR 25.863(a) through (d).
(5) No corrosive fluids or gases that may escape from any lithium-ion battery may damage surrounding structure or any adjacent systems, equipment, or electrical wiring of the airplane in such a way as to cause a major or more severe failure condition, in accordance with 14 CFR 25.1309(b) and applicable regulatory guidance.
(6) Each lithium-ion battery installation must have provisions to prevent any hazardous effect on structure or essential systems caused by the maximum amount of heat the battery can generate during a short circuit of the battery or of its individual cells.
(7) Lithium-ion battery installations must have a system to control the charging rate of the battery automatically, so as to prevent battery overheating or overcharging, and,
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(i) A battery temperature sensing and over-temperature warning system with a means for automatically disconnecting the battery from its charging source in the event of an over-temperature condition, or,
(ii) A battery failure sensing and warning system with a means for automatically disconnecting the battery from its charging source in the event of battery failure.
(8) Any lithium-ion battery installation whose function is required for safe operation of the airplane must incorporate a monitoring and warning feature that will provide an indication to the appropriate flight crewmembers whenever the state-of-charge of the batteries has fallen below levels considered acceptable for dispatch of the airplane.
(9) The Instructions for Continued Airworthiness required by 14 CFR 25.1529 must contain maintenance requirements for measurements of battery capacity at appropriate intervals to ensure that batteries whose function is required for safe operation of the airplane will perform their intended function as long as the battery is installed in the airplane. The Instructions for Continued Airworthiness must also contain procedures for the maintenance of lithium-ion batteries in spares storage to prevent the replacement of batteries whose function is required for safe operation of the airplane with batteries that have experienced degraded charge retention ability or other damage due to prolonged storage at a low state of charge.
The FAA noted that these special conditions were “not intended to replace 14 CFR 25.1353(c) in the certification basis of the Boeing 787-8 airplane” and that the special conditions applied “only to lithium-ion batteries and their installations.” The FAA also noted that the requirements of 14 CFR 25.1353(c) remained in effect “for batteries and battery installations of the Boeing 787-8 airplane that do not use lithium-ion batteries.”
FAA skal nå ha godkjent planen til Boeing for fix ser jeg fra flere steder.
Så det kan se ut som det går riktige veien.
http://boeing.mediaroom.com/index.php?s=43&item=2619Boeing (NYSE: BA) has received approval from the U.S. Federal Aviation Administration (FAA) of the company's plan to test and certify improvements to the 787's battery system. Successful completion of each step within the plan will result in the FAA's approval to resume commercial 787 flights.
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