The military's failure to purchase new search and rescue planes has led to an apparent disagreement between two federal Conservative cabinet ministers.

Auditor General Michael Ferguson, in his spring report released Tuesday, said the military's persistent failure to buy new search planes was a significant risk that affected the sustainability of Canada's rescue program.

Public Works Minister Rona Ambrose said the delay in purchasing the plane was a problem.

"It hasn't been acceptable to me."

The Fixed-wing Search and Rescue (FWSAR) program was launched in 2002, and funded to the tune of about $1.3 billion in 2004.

The first of about 15 planes was to be delivered by 2006. But more than six years after that the government has been unable to even get a bid out to tender.

- Related:Fixing search and rescue planes must be a priority, AG says

- Related:MacKay says Defence Department not to blame in plane delay

Public Works has now seized control of the purchase and is managing it through a special secretariat, similar to the one set up to manage the troubled purchase of new fighter planes.

"We initiated a new process that was open, transparent and will be very competitive," Ambrose said Tuesday.

But that process will take time, adding months to an already years long delay.

'Frustration' over delays

In March, MacKay told CBC News the delay was upsetting.

"I will express to you (...) no small degree of frustration that we have not been able to move this project forward," MacKay said.

"What I can tell you is that we are pushing very hard to have this procurement proceed. We need the support of the other departments to do this."

MacKay stiffened Tuesday at the suggestion that the Defence Department should be held accountable for the delay.

"Well, I would disagree that this has gone absolutely nowhere," MacKay said. "It's complicated in that we have a number of departments that touch on the file, for the delivery of the aircraft itself.

"The reality is, while the process is underway, it has not delivered the aircraft we need, and that our [search and rescue technicians] and our forces deserve," he said.

But that perspective flies in the face of the commonly held view within parts of Canada's defence industry. There, it's widely-accepted it was the Defence Department that had botched things by effectively drafting its requirements to favour just one possible contender, the Alenia C-27J Spartan.

Botched process

The whole process stalled after allegations of favoritism were made and the military's requirements were sent to the National Research Council for review. It agreed the military's specifications were far too specific and needed to be broadened in order to ensure competition.

Although industry insiders agree dealing with Public Works can be cumbersome and costly in terms of time, in this instance, they say, it's likely still the Defence Department that's holding things up.

The military has spent years fighting that allegation and trying to deal with the consequences.

Last year, after a long delay, the program to buy new planes started moving again, under the strict control of that secretariat inside the Department of Public Works.

This would mean a contract by 2015 — with possible delivery at 2017 — making it 15 years between the launch of the plane program, and the launch of an actual plane.

Ambrose wouldn't specifically call out the military, but she stressed Tuesday her department's role in ensuring the purchase would be fair and competitive.

Asked if she was dissatisfied with the way the military has handled this, Ambrose paused and said: "I would say we have worked with the military to ensure this is done in an open, fair and competitive way."

An earlier suggestion that Ambrose and MacKay were pointing fingers at each other has been declared "inaccurate" and "wrong" by officials in the Public Works minister's office.

But others familiar with discussions around the delay tell CBC News that Ambrose and Public Works officials are tired of being made out as the bad guys, when they believe it's clear the Defence Department has botched the process.

The dispute has even come up at dicussions between cabinet ministers.

One source suggested the debate was getting "nasty" but that Ambrose felt it necessary to stick to her guns.

"Enough is enough," one source said.

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  • UP NEXT: Memorable Harper photos

  • Stephen Harper and wife Laureen in 2011. Source: <a href="http://www.flickr.com/photos/pmharper/8472663517/in/photostream" target="_blank">Flickr</a>

  • Beer Me!

    Prime Minister Stephen Harper gets behind the bar at the Victoria pub in Montreal Friday, March 16, 2012 where he stopped in to meet some supporters and have a drink for St. Patricks Day.

  • You Eat Half, And I'll Eat Half

    Conservative leader Stephen Harper and Laureen Harper stand next to a tray of hot cross buns at a bakery in Mississauga, on April 23, 2011.

  • Cuddle Time!

    Stephen Harper with wife Laureen and their chinchilla Charlie. Source: <a href="http://www.flickr.com/photos/pmharper/8425819048/in/photostream" target="_blank">Flickr</a>

  • Easy Rider

    Prime Minister Stephen Harper waves after going for an ATV ride as he visits a farm for a campaign event in Wainfleet Ont., on Monday, April 4, 2011.

  • Nom Nom Nom

    Prime Minister Stephen Harper eats maple taffy as he visits a sugar shack in Norbertville, Quebec on Tuesday, April 5, 2011.

  • Muahhh

    Prime Minister Stephen Harper gives his wife Laureen a kiss following a day of G-20 meetings in Toronto. June 27, 2010. Source: <a href="http://www.pm.gc.ca/eng/media_gallery.asp?media_category_id=938&media_category_typ_id=6#cont" target="_blank">Pm.gc.ca</a>

  • Can I Keep Them?

    Prime Minister Stephen Harper plays with foster kittens at 24 Sussex. May 1, 2010. Source: <a href="http://www.pm.gc.ca/eng/media_gallery.asp?media_category_id=900&media_category_typ_id=6&media_id=5512" target="_blank">Pm.gc.ca</a>

  • Incoming!

    Conservative Leader Stephen Harper throws a small snowball at photographers after talking with reporters at a campaign stop in Guelph, Ontario Saturday, Jan. 21, 2006.

  • Thank God You're Not Wearing Overalls

    Prime Minister Stephen Harper gives Taylor Swift the book "Maple Leaf Forever" before her concert at Scotiabank Place in Ottawa. May 20, 2010. Source: <a href="http://www.pm.gc.ca/eng/media_gallery.asp?media_category_id=900&media_category_typ_id=6&media_id=5512" target="_blank">Pm.gc.ca</a>

  • Wedding Crasher

    Stephen Harper <a href="http://www.huffingtonpost.ca/2012/10/23/harper-wedding-photos-ottawa_n_2006374.html" target="_blank">surprises an Ottawa couple on their wedding day</a> in 2012.

  • Yep, Definitely A Cat Person

    Laureen Harper laughs as she holds a husky dog with Canadian Prime Minister Stephen Harper as they tour Caribou Crossing, Yukon, south of Whitehorse Monday August 20, 2012.

  • Harper Road

    Stephen Harper, his children Ben and Rachel, and wife Laureen cross Abbey Road in 2009. Source: <a href="http://on.fb.me/12OfGXN" target="_blank">Facebook</a>

  • Bonjour, Bonhomme

    Prime Minister Stephen Harper hams it up with Bonhomme Carnaval in the Prime Minister's Centre Block Office. November 25, 2010. Source: <a href="http://www.pm.gc.ca/eng/media_gallery.asp?media_category_id=1238&media_category_typ_id=6#cont" target="_blank">Pm.gc.ca</a>

  • Trendsetter

    Canadian Prime Minister Stephen Harper, far left, watches a third round match between Agnieszka Radwanska, of Poland, and Serbia's Jelena Jankovic with his children Rachel, center, and Benjamin, right, at the 2012 US Open tennis tournament, Saturday, Sept. 1, 2012, in New York.

  • Psst! I Like Your Hat

    Catherine, Duchess of Cambridge, speaks with Canadian Prime Minister Stephen Harper during Canada Day celebrations on Parliament Hill in Ottawa on July 1, 2011.

  • Whoops, How Did This Get In Here...

    Part of a painting of Prime Minister Stephen Harper fully nude, by Kingston artist Maggie Sutherland, is shown at the Central Kingston public library in Kingston, Ont. on May 18, 2012.

  • Giggle Fit!

    Prime Minister Stephen Harper and his son Ben watch a bloopers show while attending the Calgary Flames NHL hockey game against the Edmonton Oilers in Calgary, Saturday, April 11, 2009.

  • In The Key Of C Major

    Prime Minister Stephen Harper practices a few chords after arriving at home from work. February 19, 2011. Source: <a href="http://www.pm.gc.ca/eng/media_gallery.asp?media_category_id=1457&media_category_typ_id=6#cont" target="_blank">Pm.gc.ca</a>

  • Love You, Mom

    Conservative leader Stephen Harper gets a hug from his mother Margaret during a visit to his campaign office in Calgary, Saturday May 29, 2004.

  • We Can't All Grow A Pirate 'Stache Like Trudeau

    Prime Minister Stephen Harper holds up a moustache scarf to kick off the start of ‘Movember’, November 1, 2012 Source: <a href="http://www.flickr.com/photos/pmharper/8146161138/in/photostream" target="_blank">Flickr</a>

  • The Sweet Side Of Politics

    Senior Legislative Assistant, Katherine Locke, left, and Government House Leader Special Assistant, Zoe Lawson, show off their House of Commons gingerbread house to Prime Minister Stephen Harper in his office on Dec. 16, 2010. The gingerbread house was filled with rows of gummi bears as members of Parliament. Source: <a href="http://www.pm.gc.ca/eng/media_gallery.asp?media_category_id=1355&media_category_typ_id=6#cont" target="_blank">Pm.gc.ca</a>

  • Beach Boy

    Prime Minister Stephen Harper waves to tourists as he walks on the beach after the closing of the VI Summit of the Americas on April 15, 2012 in Cartagena de Indias, Colombia.

  • Game Face

    Prime Minister Stephen Harper plays a game of table tennis with Team Canada's Mo Zhang at Canada House in London on Tuesday, June 5, 2012.

  • Whaddya Mean It Doesn't Fit?

    Prime Minister Stephen Harper tries on an old hockey helmet at he tours the Yukon's Hockey History exhibit at the McBride Museum in Whitehorse, Yukon on Thursday, August 25, 2011.

  • Goooaaaaallll!

    Stephen Harper, his son Ben, and Wayne Gretzky watch the men's ice hockey team's gold medal game at the 2010 Winter Olympics in Vancouver. Source: <a href="http://www.flickr.com/photos/pmharper/8457917081/in/photostream" target="_blank">Flickr</a>

  • Who Said Politics Can't Be Fun?

    Stephen Harper and his son Ben hit balloons into the crowd after his speech at the party's three-day policy convention in Montreal on Friday March 18, 2005.

  • Jam Sesh

    Prime Minister Stephen Harper and Jamie Robinson (guitar) play along with Blue Rodeo's front man Jim Cuddy, and recording artist Jimmy Rankin as they belt out a tune during a Juno Awards reception at 24, Sussex March 31, 2012. Source: <a href="http://www.pm.gc.ca/eng/media_gallery.asp?media_category_id=2099&media_category_typ_id=6#cont" target="_blank">Pm.gc.ca</a>

  • Party Politics

    Prime Minister Stephen Harper, looks up from dishing out pancakes at Stampede breakfast in Calgary, Alta., Sunday, July 10, 2011.

  • I Spy Something Cute

    Stephen Harper welcomes two Chinese pandas at Toronto's Pearson Airport on March 25, 2013. Source: <a href="http://www.flickr.com/photos/pmharper/8588948719/in/photostream" target="_blank">Flickr</a>

  • Flashback

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  • Just Smile And Back Away Slowly

    Clowns ham it up with Prime Minister Stephen Harper at the IAAF World Junior Championships in Moncton, New Brunswick. July 19, 2010. Source: <a href="http://www.pm.gc.ca/eng/media_gallery.asp?media_category_id=1037&media_category_typ_id=6#cont" target="_blank">Pm.gc.ca</a>

  • Hats Off

    Prime Minister Stephen Harper, left, throws Senator Gerry St. Germain's cowboy hat into the crowd after presenting him with a new one as his wife Margaret St. Germain, right, laughs during a barbecue at St. Germain's ranch in Surrey, B.C., on Monday August 6, 2012.

  • Thumbs Up, Up And Away

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  • He's A Belieber

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  • I'm With Him

    Stephen Harper and Wayne Gretzky, joined by students on an outdoor ice rink in Saskatoon on Feb. 5, 2010. Source: <a href="http://on.fb.me/ZTlKy6" target="_blank"> Facebook</a>

  • Shhh... This Is The Best Part

    Stephen Harper, wife Laureen and Suraksha, Grade 10, visit an IMAX theatre in Bangalore, India on Nov. 8, 2012.

  • Umm... This Is My Costume

    Prime Minister Stephen Harper poses for a photograph with Halloween trick-or-treaters at his official residence in Ottawa, Wednesday, October 31, 2012.

  • Is It Cold, Or Is It Just Me?

    Prime Minister Stephen Harper bundles up in a parka as he tours Frobisher Bay in Iqaluit, Nunavut on Thursday, February 23, 2012.

  • One Of Harper's Many Hats

    Canada's Prime Minister Stephen Harper adjusts his hat prior to the arrival of Britain's Prince William and his wife Catherine, Duchess of Cambridge, for the official start of the Calgary Stampede parade in Calgary, Alberta, July 8, 2011.

  • D'awww

    Prime Minister Stephen Harper and his wife Laureen play with some furry friends at the official opening of the new Ottawa Humane Society facility on July 6, 2011. Source: <a href="http://www.pm.gc.ca/eng/media_gallery.asp?media_category_id=1724&media_category_typ_id=6#cont" target="_blank">Pm.gc.ca</a>

  • Omigod, So Cute

    Met Batisse X, official mascot of the Royal 22nd Regiment, prior to welcoming French PM Jean-Marc Ayrault to Ottawa. Source: <a href="http://www.flickr.com/photos/pmharper/8554783327/in/photostream" target="_blank">Flickr</a>

  • I Can Totally Take You

    Prime Minister Stephen Harper receives a cricket lesson from Ankur Biswas, cricket team captain, at the Bishop Cotton Boys School. Source: <a href="http://on.fb.me/12OffwT" target="_blank">Facebook</a>

  • Mush!

    Prime Minister Stephen Harper drives a dog sled after meeting mushing teams at the Arctic Winter Games in Yellowknife, N.W.T., Monday, March 10, 2008.

  • A Very Harper Holiday