Reviving the Reliability of HAL's ALH Dhruv
Around 300 ALHs { Advanced Light Helicopter } of various varieties, including the Mk1, Mk2, Mk3, and Mk4, also known as the Rudra Weapon System Integrated, are flying with the three forces and the Coast Guard. The Army operates around 145 indigenous ALH, 75 of which are Rudra, with another 25 ALH Mk-III on order and due to be inducted over the next two years. The Air Force has around 70 ALH in service, the Navy has 18, and the Coast Guard has 20 ALH.
The ALH is a critical fulcrum for the services, including the Army, Navy, and Air Force. It is a utility helicopter that was designed in 1983 and is utilised across the services for a variety of duties, including personnel and material transport.
Following three separate accidents of ALH Dhruv in quick succession , Bengaluru-based Hindustan Aeronautics Limited has decided to replace a key component of the Dhruv Advanced Lightweight Helicopter in order to improve the fatigue tolerance of the made-in-India chopper, which serves as the rotary-wing mainstay for the Indian armed forces.
According to sources, the state-owned aviation will replace an aluminum-made control rod in the gearbox with a much tougher and corrosion-resistant material. This improves both the copter's fatigue tolerance and the pilots' control of the aircraft.
Insiders said the state-owned aviation will replace an aluminum-made control rod in the gearbox with a much tougher material and corrosion resistance . This increases the copter's fatigue tolerance as well as they pilots' control of the aircraft.
HAL officials said that the ALH had an excellent safety record, having flown more than 3,75,000 hours in the last two decades, and that metallurgical improvements to the gearbox's control rod is being carried out to improve the aircraft's performance.
The mean time for helicopter checks, which was originally 600 hours, has been reduced to 300 hours, and it has been learned that it has been further reduced to between 100 and 150 hours of flying.
Function of Control Rod in Helicopter Gear Box : Explained
The control rod in a helicopter gearbox is a mechanical linkage that transmits the pilot's control inputs to the main rotor and tail rotor systems. The control rod is typically made of a strong, lightweight material such as aluminum or titanium. It is connected to the pilot's controls in the cockpit and to the main rotor and tail rotor gearboxes. When the pilot moves the controls, the control rod moves, which in turn causes the main rotor and tail rotor to change pitch. This change in pitch causes the helicopter to move in the desired direction.
The control rod is a critical component of the helicopter's flight control system. It must be strong enough to withstand the forces generated by the main rotor and tail rotor, and it must be able to transmit the pilot's control inputs accurately. A malfunction of the control rod can result in a loss of control of the helicopter, which can be a fatal accident.
Here are the specific functions of the control rod in a helicopter gearbox:
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Transmits the pilot's control inputs to the main rotor and tail rotor systems.
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Allows the pilot to control the pitch of the main rotor and tail rotor.
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Enables the pilot to move the helicopter in the desired direction.
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Is a critical component of the helicopter's flight control system.
Here are some of the common problems that can occur with the control rod in a helicopter gearbox:
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Bending or breaking of the control rod.
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Corrosion or wear of the control rod.
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Binding or jamming of the control rod.
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Looseness or misalignment of the control rod.
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Damage to the control rod's bearings or bushings.
These problems can lead to a loss of control of the helicopter, which can be a fatal accident. It is important to have the helicopter's control rod inspected and repaired regularly by a qualified technician to prevent these problems from occurring.
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US SC rejects 26/11 attack accused Tahawwur Rana’s plea seeking stay on his extradition to India
New York, Apr 7 (PTI): The US Supreme Court has rejected 26/11 Mumbai terror attack accused Tahawwur Rana's appeal seeking a stay on his extradition to India, moving him closer to being handed over to Indian authorities to face justice.
Rana, 64, a Canadian national of Pakistani origin, is currently lodged at a metropolitan detention centre in Los Angeles.
He is known to be associated with Pakistani-American terrorist David Coleman Headley, one of the main conspirators of the 26/11 attacks. Headley conducted a recce of Mumbai before the attacks by posing as an employee of Rana’s immigration consultancy.
Rana had submitted an ‘Emergency Application For Stay Pending Litigation of Petition For Writ of Habeas Corpus' on February 27, 2025, with Associate Justice of the Supreme Court of the United States and Circuit Justice for the Ninth Circuit Elena Kagan.
Kagan had denied the application earlier last month.
Rana had then renewed his ‘Emergency Application for Stay Pending Litigation of Petition for Writ of Habeas Corpus previously addressed to Justice Kagan’, and requested that the renewed application be directed to US Chief Justice John Roberts.
An order on the Supreme Court website noted that Rana's renewed application had been “distributed for Conference” on April 4 and the “application” has been “referred to the Court.”
A notice on the Supreme Court website Monday said that “Application denied by the Court.”
Rana was convicted in the US of one count of conspiracy to provide material support to the terrorist plot in Denmark and one count of providing material support to Pakistan-based terrorist organisation Lashker-e-Taiba which was responsible for the attacks in Mumbai.
New York-based Indian-American attorney Ravi Batra had told PTI that Rana had made his application to the Supreme Court to prevent extradition, which Justice Kagan denied on March 6. The application was then submitted before Roberts, “who has shared it with the Court to conference so as to harness the entire Court’s view.”
The Supreme Court justices are Associate Justice Clarence Thomas, Associate Justice Samuel A. Alito, Jr., Associate Justice Sonia Sotomayor, Associate Justice Elena Kagan, Associate Justice Neil M. Gorsuch, Associate Justice Brett M. Kavanaugh, Associate Justice Amy Coney Barrett, and Associate Justice Ketanji Brown Jackson.
In his emergency application, Rana had sought a stay of his extradition and surrender to India pending litigation (including exhaustion of all appeals) on the merits of his February 13.
In that petition, Rana argued that his extradition to India violates US law and the UN Convention Against Torture "because there are substantial grounds for believing that, if extradited to India, the petitioner will be in danger of being subjected to torture."
"The likelihood of torture in this case is even higher though as petitioner faces acute risk as a Muslim of Pakistani origin charged in the Mumbai attacks,” the application said.
The application also said that his “severe medical conditions” render extradition to Indian detention facilities a “de facto" death sentence in this case.
The US Supreme Court denied Rana's petition for a writ of certiorari relating to his original habeas petition on January 21. The application notes that on that same day, newly-confirmed Secretary of State Marco Rubio had met with External Affairs Minister S Jaishankar.
When Prime Minister Narendra Modi arrived in Washington on February 12 to meet with Trump, Rana’s counsel received a letter from the Department of State, stating that “on February 11, 2025, the Secretary of State decided to authorise” Rana’s "surrender to India,” pursuant to the “Extradition Treaty between the United States and India”.
Rana’s Counsel requested from the State Department the complete administrative record on which Secretary Rubio based his decision to authorize Rana’s surrender to India.
The Counsel also requested immediate information of any commitment the United States has obtained from India with respect to Rana’s treatment. “The government declined to provide any information in response to these requests,” the application said.
It added that given Rana’s underlying health conditions and the State Department’s findings regarding the treatment of prisoners, it is very likely “Rana will not survive long enough to be tried in India".
During a joint press conference with Prime Minister Modi in the White House in February, President Donald Trump announced that his administration has approved the extradition of "very evil" Rana, wanted by Indian law enforcement agencies for his role in the 26/11 Mumbai terror attacks, "to face justice in India”.
A total of 166 people, including six Americans, were killed in the 2008 Mumbai terror attacks in which 10 Pakistani terrorists laid a more than 60-hour siege, attacking and killing people at iconic and vital locations in Mumbai.
